possible bugs

[|MODS| Reaper]

hi guys,

about  the first one we were in walkway map wave 4 ( toxic ) 3 players ( peco , Hunter and me ) 2 players down i placed bubble on me till i can get my health aura after i placed bubble on me all bots ( zombies ) go to the down players and keep attacking them when i closed my bubble they came back to attack me .
( that's the full description )
what you guys feed this zombies .they became smarter  

is that's normal ? in any other map zombies had to freeze not moving ?
if i found that in any more maps i will take a screenshot and placed here

thanks for the reply !
Best Regards,
FrontZet 4