Bugged Challenge #1
-Eliminate Robots with Sentries does not count robot eliminations done by sentries, instead it seems to count waves won instead.
Bugged Challenge #2 & #3
For EXP_Table_Flip, 'Complete Wave 6' and 'Complete the mission' both complete on wave 5 win, instead of on wave 6 win.
https://imgur.com/a/nIEVvPq
Final note - while potentially not a bug, the non-wave completion challenges are locked until you beat all three missions, which is rather repetitive.