Mi 8 Lite Miui global 11.0.5

hi! same problem here. I found out after trying a few things that the problem is caused by My TV wired connection. when I connect My TV through the same wifi network as My phone, the Screencast of Miui 11 works just fine( Even better than in Miui 10 i'd Say) and i don't need any other app.
what do You think? could it be any other solution?