Temporary snap override on Fn key cause strange behaviour on Autocad

[rdellorcoVW4WC]

Hi,

I'm used to have perpendicular temporary snap override on F1 button and nearest on F2.
Often, after few hours of work, it happens that Autocad Lt do not work proprely anymore:

For exemple, as you see in this image above, it starts to show osnap on selecting object and do not select objects as usual (clicks follows osnap but usually selecting object do not have osnap).
It's a weird behaviour that forces me to restart Autocad.
Recently I've changed the temporary override to a Shift+Key and the bug seems to do not reproduce anymore.
But I'd like to use the function key for this, if possible.
Anyone noticed the same behaviour?
Thank you

[ВeekeeCZ · Accepted solution]

In my exprerience.. ehmm.. I would recommend avoiding them all together.

Go through the current setting of the Fx key (classic press mode) and think of the functionality that you use and don't. You can redefine the ones you use less or never for different purposes that you use more often. 

That's what I do.

By the way, the F1 key is the trouble one. There is some bug, and it's probably impossible to entirely undefine HELP. Don't use it if you want to keep your sanity.

[jayhar]

Hello,

Please try This >Command: SNAPUNIT
Enter new value for SNAPUNIT <10.0000,10.0000>: 0

&

Command: SNAPMODE
Enter new value for SNAPMODE <1>: 0

[rdellorcoVW4WC]

Yes, I think you are right, F1 cause major havoc on autocad. It seems to work but then strange behaviour starts to appear.