Blurry applications

Around the time of Fedora Linux 39 release, there was an issue where some applications (the ones using xwayland?) were blurry. This in case if fractional scaling was enabled, or the like.
The solution, as specified in this post

consisted in setting

gsettings set org.gnome.mutter experimental-features "[]"`
gsettings get org.gnome.mutter experimental-features 
@as []

I don’t know what happened, but since some days (weeks?) ago, some applications are blurry again. Examples: Telegram and Upscayl, both installed from Flathub.
I’m pretty sure that I haven’t changed anything related to resolutions, displays, gsettings options.
Someone else is experiencing the same issue?