PRBoom+ possible friction sector bug?

[Captain Toenail]

Calling all Boom/PRBoom+ experts. Are there any known bugs/mapping quirks that will cause a friction sector that's supposed to slow a player down, to actually speed a player up?

 

I have control sectors in my map that are 72 units wide with action 223 applied. These cause the player to slow down as expected. However recently one playtester entered these friction sectors and actually sped up. Are there any known circumstances/mapping quirks where this can happen? I believe they were using glboom-plus.

 

 

[SilverMiner]

The first thing I would say is:

*Demo needed*

[ViolentBeetle]

There's no demo, only video: https://www.doomworld.com/forum/post/2228257

 

And the wad in question:

We got all sorts of inconsistent results while trying to figure it out.