While playing incursion if u get disconnected/ restart the game during a fight, ur pre-fight abilities will disappear.
I also faced this bug a week ago, it hasn’t been fixed after the new update yet. (SS given below)
Angela with Odin’s pre-fight abilities before I got disconnected.(In Zone 24)

During that fight I got disconnected and when I restarted, those abilities disappeared (Same thing happened with my Herc when I was at zone 10)