in case, you have word/line wrapping active while checking the spelling, you may
try to disable it (if possible - it depends on the edited texts).
I notuced, that with wordwrap on the spellcheck unterlines only works for rather
small texts, after adding more text, the error highlighting gets incomplete and
with larger texts the underlining disappears or it is displayed only for the
beginning of the text.
Generally with wordwrapping, some other functions are sometimes limited, maybe
this is a similar case.


PSPad freeware editor https://www.pspad.com

Odpovedet emailem