The crashing happened randomly. The first time it took a few games, the next time it happened after I had left the page and returned, starting the game again it crashed on the first day.
The thing is, I put all the flags on one knight and the day after I used all of the items he was hitting for about 35 damage. The next day he was back to hitting 5. I may have had 2 knights in that run but both were hitting for 5 damage.
Not being able to reroll for units pretty much kills the game imo. You need to be able to get wizards or you just lose against slimes.