Why when I hold spacebar+mouse click to pan my drawing, Illustrator crashes randomly?

I use alt+scroll-wheel to zoom in and out - and hold space bar+click to pan my drawings often as they are really efficient.  However, I find that when I hold the spacebar and click+drag to pan, Illustrator will randomly crash.  It is truly random...let's say every 62 times I pan my drawings this way, it will crash - I save quite often, but no matter what I lose some work as it is random and interrupts my flow and it's very frustrating.  I'm not doing any sort of sticky keys-type-of thing by pressing anything repeatedly or even pressing any other keys for that matter.

I have tried looking on the internet several times for anyone else who has this issue and cannot find another case.  So I ask:

Has anyone else had this issue?  Or am i insane and not realizing what I am doing?

Much appreciated if at least one person acknowledges what I am dealing with. LOL Thanks,