I've seen this topic several times in this forum and it seems nobody is taking care of this bug.
Opera is just a web browser with too many better alternatives.
When a producer doesn't appreciate their users and takes no care of their problems the best option will be the solution that I found for this.
I found the solution!
Simply uninstall this buggy application and use a real browser like FireFox just like what I did.
We use applications to bring ease to our work. Too many people don't have time to deal with funny bugs that somebody else is responsible for solving them.
I changed the fonts in browser settings and some more ideas on it. But, opera doesn't look seem a professional one.
I mean squares? Really? It's 2022! Is it that difficult to solve for a software developer?