If you are using macOS 10.15 that has a bug and a mouse or a dial, it is due to Vietnamese keyboard input with OS. The solution is to install the external percussion device. I tried Trankynam's very popular percussion but I couldn't install it (Crash, I couldn't install it). I tried NAKL's percussion, introduced by a friend. Now you can enjoy the new macOS without error.
The macOS problem of the first major beta bugs has always existed since it started to exist. iOS is similar. However, this time of Apple this year, I found that every macOS is the heaviest while iOS or iPadOS and watchOS are all very good. Now, let's solve the macOS. Hopefully, Apple will fix this error in the next beta because I don't recommend that you use external percussion anyway.
Link to download NAKL percussion
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