Double accents ~ ´ and ^ only - Portuguese Keyboard

[answer42_Correia]

Hi everyone, I have the exact same issue as described here, where when I switch to the Portuguese keyboard, I should be able to press the accent key once and then the desired letter (for instance, u) and receive û or some other, Instead, I receive ^^u. I can type ç without issue, but I have the same issue as above with ~~ and ^^ and ´´ and ``. They always appear as double accents. So I get ~~a instead of ã etc. The same happens when using the on-screen keyboard.This issue only started yesterday and when I reboot the computer, the accents work fine for about 5 minutes and then the issue starts

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