Jakku Resistance undersized ships not working

Mine worked.  Profundity with outrider and y wing only

Same here. Used two different fleets without full reinforcements. Game gave me the "undersized squad" message before battle. However, no credit for using undersized squad. 

Will try as player above with only up two front ships and no reinforcements. 

So it worked with ONLY two total ships. I used Nego, HT, and Han's Falcon. Only needed three points for crate 8 so this worked fine on tier IV on auto.

I went in with one reinforcement, it even prompted me to make sure I wanted to battle with an undersize squad I hit yes. I beat it on the toughest tier. And did not get the credit for the undersized squad feat. Definitely bugged!!

Mine worked:
Capital Ship: Home One
Main ships: Han's Millennium Falcon
Reinforcement ships: None
Just of one capital ship & one ship.

You can have the first 4 slots filled, no reinforcements. Then it gives you credit. That's garbage, but that's how this one is going.

Thanks, Thor. That worked for me. Got it done on Tier 9 with Executor + BH ships