It is becoming impossible to play for me as well. I was playing on iphone8 up until March, very long time player with max expanded kingdom and lot of items on borad. I started to get problem that after fast-collect game crash. So - this was another driver to invest into iphone 13. It worked well for about month, but last 2 weeks it is taking more and more attempts until I can log in. I already strored almost half of what I had on board. each time I store something it helps for about a day or so and then problem starts again. I have been trying wifi, 4G different providers etc. nothing helps.
Update: After I posted here and logged support ticket - I was lucky to get in game. Have been trying for 7 hours before that. Stored again everything that I do not collect daily. But it would be sad to have so empty kingdom and to pull items in-out inventory all the time.