MacBook Pro AirPlay to iPad Pro losts wifi and keyboard connection

I'm using
  • MacBook Pro 16-inch (2019)

    • macOS Big Sur ver.11.1

  • iPad Pro 12.9-inch

    • iPadOS ver.14.2

and my mac losts wifi connection right after getting connected with iPad. Once I disable sidecar (or air play), it works well. And sometimes my mac gets too many inputs from keyborad, like when I type "mac", it automatically shows "mmmmmmmmmmmmaaaaaaaaaaaaaccccccccccccc", using magic keyboard or not. Then it just losts connection if i was using the magic keyboard.

These started to happend yesterday, and I'm trying to get iPad's software upgraded.

Does anyone has same experience with me? How Can I Fix This??? It is the only reason I bought iPad, even the biggest one, to use sidecar😇

https://support.apple.com/en-us/HT210380

MacBook Pro AirPlay to iPad Pro losts wifi and keyboard connection
 
 
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