Upon deleting labels, for example, the text is unreadable on the pop-up dialog and the buttons. Not sure if it was fine before, to be honest, don’t remember.
Using Linux (Budgie/Ubuntu, 23.04), US locale. Everdo v1.8.2 (snap).
I have the same problem when employing the Snap package (see screenshot).
Usually, I use the AUR version but since it has not been updated in a while (as mentioned here), I was forced to using the Snap version and found the same behavior you describe.
This is being investigated. Thank you for reporting.