Thanks for the explanations. I just noticed that sometimes the spellcheck highlights are visible in the notes but if I change note and come back to the original one they disappear. Sometimes they come back after 30 seconds automatically.
If I scroll a note with some spellcheck highlights sometimes the highlight disappear.
The behavior is not consistent at all and it is very slow.
I just noticed that today, after enabling spellcheck, Obsidian CPU usage is often spiking a lot slowing down my computer. Usually it is around 5% but today it is often over 40%
Spell checking can take over 20 seconds to start on a note I just opened. It’s especially annoying, as I can’t know if there are no mistakes, or just the spellcheck hasn’t kicked in yet. Only checking the part of the note you are on also makes this worse, I have to wait after every scroll.
And I also noticed CPU spikes when I enabled spellcheck.