The game is crashing for me when the bombardier uses their ability. It has happened 3 times out of 6 so far on the adana second challenge missions on xbox one. Wideburst skill just crashed me as well.
Both of those troops’ ability have a % chance to burn as of 1.0.9. There could be some kind of glitch for you whenever it triggers.
I read Xbox1 but I also read this thread is in “Suppprt (pc/mobile)”. Moving it to the right sub forum 
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There’s a known bug with burning (and similar status effects) on Xbox One/PS4.
The next update should fix it. We don’t have a release date for the update just yet, but it should be soon.