Are these from the same network?
The one on the right seems to be on a network with an MX and the one on the left seems to be from one without an MX appliance. However I just tested and I have two networks, one with an MX and the other with just access points.
I wasn't able to replicate your issue myself, which is odd. Maybe the firmware versions of the network affect that feature?
The only place I could find 'priority' was under the SD-WAN & Traffic Shaping for the MX, if I created a custom rule there.