Track stops recording but keeps playing

Ive done it before and had to zoom all the way out to see that I had the PunchIn turned on, other wise it didnt show up.

But if your seeing it record and then drop out, you should see the red line in the time ruler.

Weird, havent seen this prob yet,  Ill be watching to see what ya find.

I know every once in a great while mine might get a little screwy and Ill have to save, close and restart to clear things back up

It sounds like auto punch is on. 

In the time line, auto punch shows up as two reddish triangle markers..... one at the start point and one at the end and they are connected for the duration by a reddish line between them indicating the area the punch is active. 

I use auto punch a good bit, and at times forget I have it set in a track... So when I go to a different track at a different part of the song and attempt to record.... it doesn't record....then I remember the punch.... 

Any time I use AP in a project I add it to the top tool bar so it's easy to see at a glance.