My thoughts exactly. I have a larger 3-3.5" female as well. They are known to be pet holes, but I see both my ladies every day, This one here pushed all the dirt into the middle of the deli cup and webbed all around the side like a race track and I can see in all the way around.
The larger lady did the same thing kinda, she went all around the top of the deli cup like a race track, but she also went down into the sub to the bottom on one side and around a bit then back up, and she even molted at the top of her burrow entrance, so if I hadn't have had to go to work, I would have been able to see the whole thing.