Getting into a wheelchair while laying on the floor causes your sprite to float behind said wheelchair when it moves

[Scribble-Sheep]

Exploit Reports

• I confirm this issue is not an exploit. (Required)

BYOND Version

515.1647

Issue Description

If you're floored from either the *collapse emote, or from having no legs, and climb into a wheelchair, your sprite will lag behind it when it moves, even after you "stand up" atop the chair.
Getting out, standing up, and getting back into the chair lowers the effect, but your sprite will still be desynced a bit.

What did you expect to happen?

Normal wheelchair operation

What happened instead?

Floaty ghosty vulp oooh

Why is this bad/What are the consequences?

No response

Steps to reproduce the issue.

Pick a character without legs. Get out, wait for yourself to slam to the ground. Climb into a chair and move around.
Spawn a normal character and *collapse and do the same thing to find it's just anyone who's horizontal.

When did the problem start happening?

I'm pretty sure it's recent, as this doesn't happen on my old master from before I started work on #27999.

Extra information

No response

Relevant log output/runtime error