So here’s a new one…well two actually.
Last night I switched to my mobile from pc (I have them linked) and when I got there my team #5 who I had been using most often as my main on the pc was not there, just blank. Which meant that after a number of battles when I went into to check my defenders it was blank as well. So was I being attacked and giving away auto-victories? Dunno.
EDIT: Ozball is more savvy at forumness than me and found this is known.
Issue #2 - I was doing storyline and fighting a very tough battle. My Maw had already devoured, and then suddenly for some reason started collecting yellow mana again, which prevented me from boosting my sunweaver like normal. I thought maybe I was glitched and would get to devour again - free victory - but that wasn’t the case. Maw’s powered up image appeared again… but when I clicked cast there was nothing there.
So essentially, Maw siphoned my yellow (one of my higher buffed/quicker matches) and I lost the fight because I couldn’t build sunweaver as fast/like I normally do. 
Ps - apologies if this is a repost/miscategorized/already covered elsewhere.