I have the exact same issue as you. Non-stop crashes. It started as Cliffy error crashes but now the game fully shuts down after every single battle, after opening a chest, upgrading troops, etc…
It is definitely an account issue from all the testing I have done as the game works fine on the same console using an alt account.
I reported this on this helpdesk 21 days ago but sadly haven’t gotten anywhere and haven’t had any reply for 10 days now
EDIT: Just saw your reply that you are a returning player from 2016. I was the exact same but last played in early 2017. It definitely has got to be something to do with that for both of us!! If you find any sort of fix or hear from support, please let me know.