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Same issue here on an iPad Pro 2020 with iOS 17.6.1 & plenty of free memory. Support told me not to delete and reinstall game again but to wait for an update so my boosters wouldn’t get lost. They had me send a video of my screen so they could see what was happening. Hopefully 🤞 it will be working again soon and the update won’t take too long. I do think this must be a widespread issue.