It's a linux distro issue. Happens to me all the time (after upgrade) in openSUSE Leap. I don't know exact solution now, but could post it in a day or two after I get back home. On Xubuntu works without these issues. AMD opensource radeon drivers in both cases
Personally i think opera is getting off track. They have over the last few years with the new versions removed all for the features that made Opera Great. Now it is just another Browser with potential but sucks!
Surely they have research on what made the browser popular? and most other browsers can saved Pinned Tabs by default... Why on earth would they remove such a feature ???????????????
For me? I am finished with Opera! I just found Vivaldi ! Still being developed but already fixing all these irritating little things that is creeping up in Opera lately --- https://vivaldi.com
Bey Bey Opera