Man, ram management is brutal on MIUI 13. Now I don't know if this is the problem with this particular build, or with the MIUI 13 in general but I remember It has been much better than this on MIUI 12.
Although for the last 3 months I have been using Aarow OS 12 and ram management was really great there. Now If I have more than 4 tabs open in web browser, switching from let's say sixth tab to the first one will reload the website which is really really annoying.
Another issue is, as I prefer to use 3 buttons navigation instead of gestures, when pressing recent menu button, sometimes there is a delay about 2 seconds before it opens recent menu. I don't know why, does it have to do with the current build or this is some kind of feature?
Otherwise, everything else works just fine.