Instant spell check results in extrem typing delays

The instant spell check seems to be working always in background even when disabled.

Typing in on big mails or todo tasks with multiple language content results in enormous typing delay. Even when switching of this function either via “Tool - Instant Spell Check” content menu or even when disabling complete via preferences (which I don’t like at all as this is time by time a usefull feature).

As I’m typing 10 finger pretty fast sometimes it takes seconds untill what I typed in is appearing on the screen. Disabling instant spell check is giving some relief but is not really resolving the problem.

What makes me wonder is - sometimes this problem is more serious then other times but I was not able to identify any roout cause analogy to any other activity.

I really would appreciate any problem resolution as this is quite a working impact.

Regards, Mike