Issue with Enoch Boss Battle in sector 3 conquest

I have tried this 5 times now. Attempted full auto 2 times with ROLO, Sana, Old Ben, 3POC and CLS, 2 times with CLS, Han, Chewie, 3POC, and Old Ben, and 1 time with the standard CLS squad. In 4 of my 5 attempts, the buttons disappeared within the first minute of the battle, seemingly before my 5th character, OB/3PO, could take their turn.  The 5th was a loss (possibly because the character died before they could take a turn). Data disks were assertive command, VA, AA(x2), protection shield and RO.