Every time I use intellisense or hit my spacebar in the VBA editor, it would do a backspace. I thought I had an issue/bug with my intellisense. After a couple of days of this driving me crazy, I finally figured it out.
If this is happening to you as well, you probably have a form open, with a timer event. Each time the timer event fires, your code looses focus, and the line is trimmed back to the last non-white space character.
Close the form, or stop the timer.
This was a solution provided by David I thought I would share with the rest of the loungers that might have the same issue as I did.