Hello people, I have the same problem but I have a few ways to fix it;
First: Close and open Opera again and when it just starts open telegram in the sidebar, that work for me.
Second(when you forgot to do the fisrt on): You can open in a tap telegram and anchor it on your taps so you don't need to restart Opera

Hello people, I have the same problem but I have a few ways to fix it;
First: Close and open Opera again and when it just starts open telegram in the sidebar, that work for me.
Second(when you forgot to do the fisrt on): You can open in a tap telegram and anchor it on your taps so you don't need to restart Opera