I got this response from Opera GX team and it works. Just sharing it here incase someone else is having the same issue.

I got this response from Opera GX team and it works. Just sharing it here incase someone else is having the same issue.

@leocg Unfortunately no change, icon is still missing.

@leocg
Yes other icons are still there. I also tried disabling all mods and extensions (in the picture they are on) but still looked like the way it does above.

If it helps, I was deliberately using an old version (with old UI active) because there was a problem with tabs being permanently highlighted. I switched to new version after hearing that old UI was going to be removed anyways. After switching heart icon disappeared.

I can't see the hearth icon to add bookmarks