PT 11.3 instrument track cursor selection highlight extra notes



Apparently just in this project. I edited this project fine many times before, today I noticed this behavior. I tried it in other older projects and I don't see this behavior.
When I select this particular instrument track, it grabs one extra 1/8th note to the right, whether I start the selection-drag from the left or right.

On another instrument track in the same project, this behavior doesn't occur.

Any ideas? It seems like a weird option to exist.