I’ve seen multiple forum messages about the 18/22 and I got the exact same thing last week.
It happened after I bought the one time offer, going up to Lv9.
After re-installing the game it was working fine again and the loading screen bug seemed to be fixed.
However, today I bought the 750 cash (50% discount) one hour ago and after rebooting the game
it got stuck on 18/22 again. Is it just coinsidence or a purchase might be the trigger for this issue?
Hopefully it helps in your investigation…