Do you know if your Quest 2 is overheating, and that's causing the Quest to reboot? If so, maybe try lowering the resolution setting in the advanced video settings. Another possibility is somehow the corrupted data isn't getting completely removed with an uninstall. There currently isn't a way to backup the saved data on the Quest 2, but I'm currently looking into it. In the mean time, if it's not too much of a hassle, then a factory reset of the Quest 2 might help.