t_o_mThe latest TF2 update seems to cause a problem with custom HUDs in MvM. Medics experience severe lag when hitting bots with the projectile shield. I'm able to reproduce this using IdHUD 3.5, but I suspect other/all HUDs are affected since no one commented about also using IdHUD when I mentioned it. [edit: ... to other players who had the same issue ]
I found a comment on this thread from 10 months ago, just prior to the 3.0.7 release http://22.214.171.124/16751/improved-default-hud/?page=5#127 reporting an identical issue. Same bug back again?
Looks like Valve broke damage events. Try to disable it — open "\custom\idhud-master\scripts\hudanimations_manifest.txt" and comment the line #15 (add "//" symbols before), then save the changes and restart Team Fortress 2.
Commented line must looks like:
// "file" "scripts/hudanimations_tf - hit indicator.txt"
If this doesn't help, try turning off combat text damage done ("hud_combattext 0" in the console).