Equipping Tool w/ CollectionService tag removes the tag on clients other than the first to connect to game

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#1

This bug has been fixed by Roblox

When I equip a tool with a CollectionService tag on it and I am not the first client to connect to the game, the CollectionService tag gets removed

Below are GIFs of the issue (look at the output window and when I equip the tool). The GIFs are from test servers inside of studio but I am pretty sure this happens in live servers as well from my testing

I have the following in the place file in the GIFs:
A Tool in StarterPack
A LocalScript in StarterCharacterScripts with the following code:

local collectionService = game:GetService("CollectionService")

local player = game.Players.LocalPlayer
local character = player.Character

local backpack = player.Backpack
local tool = backpack.Tool

collectionService:AddTag(tool, "test")

tool.AncestryChanged:Connect(function(_, newParent)
	print(newParent, collectionService:HasTag(tool, "test"))
	wait()
	warn(newParent, collectionService:HasTag(tool, "test"))
end)

Player 1 (works as expected; tag stays on Tool when equipped)
https://gyazo.com/f77e342174c8489b16eb95b8d8c61fcf

Player 2 (does not work as expected; tag gets removed from Tool when equipped)
https://gyazo.com/b2b629256701465f8cccea6c7fed11a5

Player 3 (does not work as expected; tag gets removed from Tool when equipped)
https://gyazo.com/f28c10662929ba83243e533a5462f0c0

Here is the file that is being used in the GIFs: collection-service-bug.rbxl (21.6 KB)

Is this a bug or an issue on my end? I haven’t seen anyone else saying they have this problem

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#2

If you’re adding the tag from the client, and it looks like you are, the other clients will have no way of knowing the tool has a tag because of Roblox’s replication rules.

#3

I am adding the tag to each client’s tool on the respective client because the LocalScript with the code is in StarterCharacterScripts

I understand why you had this misconception because the title’s wording is a little confusing

1 Like
#4

Out of curiosity I added a listener for CollectionService:GetInstanceRemovedSignal() to see if it was getting removed and it was.

Don’t know if this is the source of your problem but according to the documentation for GetInstanceRemovedSignal there are 2 conditions where the event is fired:

  • The tag is removed from an object within the DataModel (game) using CollectionService:RemoveTag (not the case for your scenario)

  • An object with the given tag is removed as a descendant of the DataModel , e.g. by un-setting Instance.Parent or similar

Not really to sure if this solution is suitable for your use case, apologies if it isn’t:

local collectionService = game:GetService("CollectionService")

local player = game.Players.LocalPlayer
local character = player.Character

local backpack = player.Backpack
local tool = backpack.Tool

collectionService:AddTag(tool, "test")

tool.AncestryChanged:Connect(function(_, newParent)
	if tool.Parent.Name == "Backpack" and not collectionService:HasTag(tool, "test") then
		collectionService:AddTag(tool, "test")
	end
	print(newParent, collectionService:HasTag(tool, "test"))
	wait()
	warn(newParent, collectionService:HasTag(tool, "test"))
end)
#5

I wanna ask is it possible to check a tag on the server instead of a client?

#6

Thank you for the detailed explanation. I’m guessing this is a bug on Roblox’s end since both conditions are not met when the tag is being removed…

I will not mark your post as a solution because your solution is not very practical for me, but your reply was helpful because now I know it is probably not an issue only for me

1 Like
#7

Are you asking if you can use CollectionService:HasTag on the server? If you are, then the answer is yes, as long as the tag is applied on the server

2 Likes
#8

When tags replicate, all tags on an object replicate at the same time . Therefore, if you set a tag on an object from the client then add/remove a different tag on the same object from the server, the client’s local tags on the object are overwritten.

Could this be part of the problem?

Edit: it’s probably not this then.

#9

I am not using CollectionService anywhere on the server, so unless I am misunderstanding what the quote is saying, I don’t think so

1 Like