Player can jump over tall unanchored parts while their jump height does not allow the player to jump that high

Bug Reports Engine Bugs
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1

When the character jumps against a tall, unanchored wall part in the Workspace, the character unexpectedly passes over the part instead of being blocked by it.

Expected behavior

The character should jump against the wall, not over it—unless the jump height allows it to, which is not the case here.

2

This doesn’t reproduce for me so I expect it to be related to your animation package. However, if you change the Humanoid.MaxSlopeAngle to a lower number, does this stop happening?

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3

I tried to change the Humanoid.MaxSlopeAngle, tested multiple values but the same outcome occurs. Also, I dont think it has to do with my animation package, I got the standard animation pack.

4

can you share a placefile that can repro the issue? Thanks!

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5

Place1.rbxl (54.3 KB)
Here’s the placefile. I lost the original, but I recreated it as closely as possible and the issue still occurs with this version. Let me know if you need anything else. Thanks!

6

Closing since we cannot reproduce the issue.
In any case, this is likely a long standing glitch that we cannot fix without disrupting the behavior of other experiences.

7

I know this bug was closed today, but I wanted to report that I tried testing this bug using your RBXL file and was able to pretty consistently jump over the block (usually after moving towards the block constantly while holding the jump button) within 2-3 jumps, as shown in this video:


I also tried using the default blocky R15 character by unchecking StarterCharacter’s LoadCharacterAppearance property, and while it took many more jumps to trigger the bug, it still happened after 10+ jumps at the wall.

Since it’s much easier to recreate using my Roblox avatar, I imported it using Moon Animator and turned it into a StarterCharacter replacement. Just import this RBXM file and move the model into StarterPlayer, then try jumping at the wall and you should hop over it within a few jumps.
StarterCharacter_JoyfulFlowerMary.rbxm (70.5 KB)

I’m using Roblox Studio v0.675.0.6750712 on Windows 11, with these beta features enabled:

Beta feature list
  • Acoustic Simulation
  • Avatar Joint Upgrade
  • CreateAssetAsync Lua API
  • Dragger QoL Improvements
  • Haptic Effects
  • Import Queue
  • Improved Constraint Tool
  • Incremental Typechecking and autocompletion in studio
  • Input Action System
  • Live Animation Creator
  • Multilayer Wrap Fix
  • New Luau type solver
  • New Studio Camera Controls
  • Next Gen Explorer
  • Preferred Text Size Setting
  • Revamped Asset Manager
  • Script Sync [Early Preview]
  • Studio solid modeling improvements
  • UI Styling
  • UIDragDetectors
  • Video Uploads

Also, I’ve tweaked some FFlags, but I don’t believe any of these affect physics or character movement.

FFlags modified using Roblox Studio Mod Manager
  • AnimatorIsThrottledPropertyEnabled → true
  • CSGLevelOfDetailSwitchingDistance → 500
  • CSGLevelOfDetailSwitchingDistanceL12 → 550
  • CSGLevelOfDetailSwitchingDistanceL23 → 600
  • CSGLevelOfDetailSwitchingDistanceL34 → 650
  • FRMMaxGrassDistance → 800
  • FRMMinGrassDistance → 400
  • ZoomToExtentsApi → true
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