MIUI 12.5 Enhanced Edition has started reaching devices globally, but not without issue for some POCO F3 handsets. Apparently, the update has left affected handsets to experience frequent reboots, with 'framework' seemingly the problem.
https://www.notebookcheck.net/MIUI-12-5-Enhanced-Edition-is-causing-reboots-on-some-POCO-F3-smartphones.559036.0.html