Switching Tools causes Lagspikes, Animation glitches and teleportations for 1 tick

[felyrun (Felix)]

Hello,

First of all sorry for the low-quality bug report. I have very limited information about this issue.

The issue is only happening in a specific game: Emergency Hamburg - Roblox
The game has generally been behaving weirdly since yesterday after staying in it for a longer time. This includes memory leaks, lag spikes, and bugs with walking sounds. However, I only have a working reproduction for one of these bugs.

Note: There has been no game update in the last weeks.

1. Join Police Team
2. Equip the MP5 from the locker room (Requires 1000XP)
3. Equip it and then equip another tool

you will be teleported to a totally different place on the map for a very short time (Visible on the minimap) while your camera stays at the same position.

Videos of the bug: bug2.mov - Google Drive, Bildschirmaufnahme_2024-01-18_um_16.50.48.mov - Google Drive

Some errors are sometimes also shown in the console. The memory usage is suspiciously high. Normally, due to content streaming, our game does not use more than 1.5GB of RAM.

[eronaught]

Thanks for reporting this. Would it be possible to generate a repro for the teleportation bug? For example, a place where I can equip an MP5 and then another tool?

[felyrun (Felix)]

Hey @eronaught!

Thanks for reacting to the bug report. While trying to create a reproduction of the teleportation bug, I tried to find any difference between the MP5 and other tools. I discovered that a part of the MP5 was not welded to the rest of the model. After welding it, the issue disappeared. Sorry for bothering your team with that.

While that’s true, the issue appeared without a game update from our side (The unanchored part existed for 2-3 months), so that’s why we suspected it could be an engine bug. But now we know it isn’t.

Thanks!

[eronaught]

Excellent, that’s great to hear! Thanks so much for the update!