Robot Vac not cleaning very low rugs

I have some very low rugs (really more like floor mats) on my hard floor. When I first got the robot vac it was simply rolling over these rugs and cleaning them.

Now (maybe after an update?) it avoids them like they are an obstacle. What gives?

They are extremely low, maybe 6mm tall.

Any idea how to get them to clean these?

No one at all having this problem?