Having the same issue here within Studio. It’s definitely because of streaming enabled as the bug stops occurring after it’s turned off.
So i have these 3 characters, all of them work fine except the noob one. First time you change to the noob it works fine but if you change to another character and go back to the noob he gets stuck in the floor
If its some odd, occasional streaming glitch, maybe try spawning items in a two step method - first spawn near, but within the minimum radius in your streaming settings, to some arbitrary spot on your map (out of view of the players), but within that radius… then perhaps do the Humanoid:BuildRigFromAttachments() that @CodeWriter suggested, and then finally spawn the NPC to where you calculate it should be. … It’s just an idea.
The ragdoll package you’re using has a bug in it 
What you need to do is make sure your HumanoidRootPart has its collision enabled after spawning.
Interesting… I didn’t even think about the ragdoll system. I’m not sure if this really is the sole cause, but it looks like @EchoReaper designed the ragdoll system I use to disable HumanoidRootPart collision while the rig has been built on the character, even while the ragdoll isn’t in use.
That being said, this bug is inconsistent enough for me that I don’t know the best way to test whether the ragdoll system was the cause, or if it was a StreamingEnabled issue.
Should have just linked my other post on it
Been having the same issue. Solved it by setting the collisions between characters to InnerBox in game settings. But then there’s that issue where I don’t want players colliding into eachother. Tried a few other ways to disable collisions on characters but they all lead to that bug of the character freefalling on the ground.
It also occurs sometimes which is the worst part and never occurs in studio. So when play testing on studio I don’t get the bug, but on the actual game when spawning as character I get stuck almost 3/4 of the time.
Not sure about the streaming as I don’t have that enabled.
Edit: Found a workaround after all this time. Not the best, but it still works how I want it to.
Since this occurs while freefalling I check for freefalling then set their HipHeight to what it’s supposed to be. But sometimes that doesn’t fix it so I add an extra .5 then set it back. Might be better to place it in a .CharacterAdded event but I don’t have major issues on memory and I’m not too sure if it would work.
local function isFreefalling(char)
local State = char.Humanoid:GetState()
if State == Enum.HumanoidStateType.Dead or State == Enum.HumanoidStateType.Jumping then return end
if State == Enum.HumanoidStateType.Freefall then return true end
if char.Humanoid.FloorMaterial == Enum.Material.Air then return true end
end
while true do
for _, v in ipairs(game.Players:GetPlayers()) do
pcall(function()
local Res = v.Character.HumanoidRootPart.Size.Y * 1.2
if v.Character.Humanoid.HipHeight ~= Res then
v.Character.Humanoid.HipHeight = Res
end
if isFreefalling(v.Character) then
v.Character.Humanoid.HipHeight = Res + .5
print('Was stuck, perhaps fixed.')
end
end)
end
wait(.1)
end
I’m also having this issue in my game if I set StarterPlayer.LoadCharacterAppearance to false. It only seems to happen in Studio the first time you spawn in; resetting seems to fix it.
In relation to this, I have Players.CharacterAutoLoads set to false, and am spawning and applying a HumanoidDescription to the players manually. Haven’t tested in a live game, as I will not publish my game with bugs like that.
this issue is still ongoing after months, I myself and experiencing this too
This is still happening Weaponcraft [DEV] - Roblox
With streaming enabled, it seems to set the HipHeight of certain player’s characters to 0 on their client and they clip through the ground and slide.
The bug is still happening, only with Streaming Enabled our characters bug when spawning into them. The hipheight gets bugged, we tried even force hipheight and that doesn’t fix it.
We tried StreamingPauseMode on Default, ClientPhysicsPause and Disabled.
Example:
Here’s the game link but we disabled streaming enabled temporarily in the game. Sadly with streaming enabled disabled the game is often laggy for mobile players.
We also noticed that you get weird leg glitches with streaming enabled when morphing:
I tried copying & pasting a character into startercharacter yesterday, and it was permanently stuck sliding around the floor despite the hipheight being set.
It’s like Humanoids are storing some internal properties that devs can’t access
Has this been fixed? Or is there a solution someone is able to script until its fixed?
I have seen this bug on Trade Hangout too. It was a one time thing and I thought it was just the one server or an exploiter came. So it’s probably not just Dawn of Aurora.
I’ve been continually experiencing this across three different games that I have managed over the last year; the two things that will trigger it are (both are required):
Here’s my (far out, just conjecture) guess as to why this happens: HipHeight is calculated on the client, and certain things aren’t loaded in at the time of calculation due to content streaming. The problem is, respawning the user doesn’t seem to resolve this - it requires the user to rejoin to have a chance of not experiencing floor sliding.
I’m pretty sure that this is not just the game not being able to calculate the hip-height. I think this is due to the game not being able to detect your avatar for a few seconds, then suddenly being able to detect it.
This doesn’t require the said person to leave and rejoin, it happens if you rejoin as well. (It is possible that the said bugs I am experiencing are a different bug, with similar side effects, as it usually happens after I land on something, but doesn’t happen when I spawn in)
My game doesn’t have streaming enabled toggled but it has the same issue.
I continute to face this issue. No streaming enabled, im using a custom character and custom spawn script.
I have solved the issue on my end merely by setting the player’s character to the character model before parenting the model to workspace. This was the only noteworthy difference between this game and another game I previously made which didn’t have this issue. May help others.
I don’t recall why I didn’t use this order in the first place. I’ve reset/respawned dozens of times and no issue.
I moved by spawn back down to floor level and set the character to spawn at the spawn location + hipheight. Still works, no issues. Well, i didnt respawn once and the reset button didnt work once but…
Anyway, I still believe it should be fixed by roblox such that the humanoid hipheight wont for whatever reason set itself to 0 sometimes if done the other way round. It has affected many people.
I know this post is almost 4 years old but I found a really simple solution:
When the player’s character loads in, use player:RequestStreamAroundAsync(character's position)
