Xiaomi has opened a survey for fans to complete in regard to MIUI (Global ROM). The feedback form is short and sweet with focus on MIUI features and bugs. Xiaomi's own MIUI 12 Global ROM bug tracker is filled with dozens of entries covering a wide range of Mi, Redmi, and POCO devices.
https://www.notebookcheck.net/Buggy-MIUI-12-forces-Xiaomi-to-open-survey-for-Global-ROM-smartphone-users.543019.0.html