Thanks bro for your reply, i tried different router but fortunately same problem existing and already tried different channels but no satisfied result!If changing the channel doesn't work but turning BT off does, unfortunately your router might have issues with the Xiaomi BT chip (something similar happened a few years ago with Samsung chipsets and Netgear/TP-Link and a router update fixed the issue). Have you tried a different WiFi network?
When turn the Bluetooth on that happened even there's nothing connected withIf this is happening with any network, then it might be a hardware issue with your phone's radio. If you boot up into Safe Mode, does it also slow down? What about using a different set of headphones? BTW, does this happen just by having BT on, or only when it's transmitting?
If i run the second space feature do you think it's enough instead safe mode?OK, I'd still try in Safe Mode (to rule out if it's an app that's causing the issue) and try turning WiFi and BT off, then turn WiFi on and connect to the network, then turn BT on while connected. If all these fail, I'd take the phone in for repair.
Thanks brother for tour concern, I I really appreciate itNo pun intended, but it's safer if you go to Safe Mode. That way no 3rd party apps would interfere.