The disappearance of skill buttons

In the conquest mode, a bug was found in the final battle of Sector 5 (under certain conditions, the ability buttons disappear during the battle). The video is attached. The bug is easy to repeat. PS Perhaps the problem is that Rey (Dark Side Vision) finishes off Darth Traya and summons Supreme Leader Kylo Ren, who has no one to beat as Darth Traya has already been defeated.