[BUG] ZDoom thing bridges are pushed upward if someone rides a lift up under them

[rakohus]

Describe the bug ZDoom thing bridges are pushed upward if someone rides a lift up under them

Build that the bug occurred in 10.2-RC2

To Reproduce wdl2022.wad map29. See video. Ride the lift upward under the bars. The upper middle linedef bars are lined with thing bridges that act as blockers. If you situate yourself under the bars, your player object will push the thing bridge upward and out of its defined position.

Expected behavior When the player's head hits the thing bridge, send the lift back down. Prevent thing bridges from being moved up/down. This looks to be the behavior in our ctf contemporary - Zandronum.

Screenshots, NetDemos, & Crash Dumps Video of event occurring in blue base Supplemental video 2022.08.07_21.52.25_doom2.wdl2022.odd.zip