Getting pushed out of queen's tentacle grab attack doesn't stop its damage

[WhenTanksFly]

d_queentacles_t9500_v7139.zip from City17's last mission. Perhaps marines should be immune to all pushing effects when grabbed?

Originally happened in jheight's Mini RPG, difference is I was able to walk after escaping the tentacles - which I failed to reproduce in above demo from a different map, so I'm not sure if this possibility is unique to that specific script-heavy map. The Mini RPG replay (138 Mb when unzipped): https://dropmefiles.com/6OmSH, tick 133000+, though the replay is likely to crash the game if jumping straight to that tick, so jump to 120000 and fast-forward until then. A bunch of crash minidumps: d_minirpg_queen_replay_crash_dumps.zip