ok this bottom screen mouse problem is solved by xiaomi with the update version 3.0.463 of the MIUI For TV. that older version 3.0.359 MIUI for TV this is the cause of the problem 1 mth ago.
Do you think is possible for us to revert to a older firmware? Btw, I realise mouse left click works for the on-screen keyboard that appear at the bottom. So for now, it's still half the screen 'scrollable' with mouse.
I am having problem with netflix.
i have the same exact situation happened 5 days ago with mi4 65". still cannot solved. Here found someone with the same problem as me, make me think its some firmware updated problem. hope xiaomi can update a new firmware to solve this ASAP.
i was planning to get a new TV because of this problem, now maybe i wait for a while. As the TV still works well with the remote.