@leocg If I change my keyboard layout to Brazilian Portuguese, accents are on other key, but still not work. Key layout doesn't matter. It is still only in Opera.

Additional information - in older versions of Opera it still doesn't work. I apologize for my little bad English.

If I want to write any character with interpunction as combination "punctuation key + character key", it writes only character key. For example I want to write ť and it writes only t. If I spammend only a punctuation key, after some times it will write a few interpunctions, for example ˇˇ.

In incognito mode without any extensions it doesn't work too. If I installed pure chrome browser it doesn't work too. I think that's some problem with the chrome core. In Microsoft Edge browser, in system interfaces and other all apps it works correctly. I tried to replace the keyboard and plug it into another usb port and it still didn't work.

Please help me.

Opera 67.0.3575.137
Windows 10 Pro 1909 Build 18363.720
Keyboar layout is Czech
Language for Opera is Czech