Been through to the last page to find out this ROM is based on the original Chinese ROM, that explained a lot of the issues bugged me for a while, including but not limited to:
1. app push notification issues, with gmail and some other apps, but not xiaomi's app, they always show up even I just used them once...
2. G message chat function broken, took me one week to come to a solution or is it solved with an update, couldn't remeber...
3. google phone app took like 10 seconds to pop up when call coming in, that's just...
4. When boot into recovery mode, it showed up xiaomi recovery in chinese sometime. Not a bug, just found it weird.
I also have a POCO X3 with POCO system, it's much more stable and reliable for using Gapps. Now I'm gonna to flash a POCO F3 rom instead.
Great effort, great stuff, especially for the noobs like me...but just too old to deal with bugs all the time..