Unwanted Track Muting After certain point in recording - GarageBand

In GarageBand, I am working on a song (with drum machine, guitars, and bass). And I accidentally hit some buttons and now after a couple measures, the right side guitar track of the mix automatically mutes when it reaches the start of the last measure that I added. And, when it does that muting of the track, the mute button on the left handside of the screen changes to show that the track is muted, like I had pressed the mute button. Are there any ideas of how to remove this automated muting?