Frozen TB Battle

For who knows how many TBs, I've encountered this issue. Doing the combat mission on Mandalore today (and one on Dathomir yesterday), my battle has become frozen. The characters are moving, I can interact with the buttons in the top left and change who is selected, see their buffs/debuffs etc., but I cannot see nor interact with the ability buttons of my characters. JMK called mass assist on Dark Trooper, who shows to have no health in the top right but has a bar of health above the character, which is still standing with 2 stacks of "Dark Trooper Squad". No one will take a turn no matter how long I wait.

Is there some way to fix this issue from occurring? I swear it happens 1/3 of the times I run the combat mission on Mandalore.