nagamati ASIAIR is slaved off AM5 side power port, and AM5 was powered by a 12V/10A power brick while the camera has its own 12V/5A power brick - fed to AC wall outlet if I'm home
Do not power the ASIAIR from the mount. Give the ASIAIR the cleanest power possible.
If you use more than one power supply, make sure you have a heavy ground braid (or heavy wire) that connects the ground returns of the multiple power supplies' together. The closer you do this to your instrumentation, the better. This will prevent the ground returns of the USB cable from acting as the ground return for DC power.
Do not use the USB hub in the camera. Connect your accessories to the ASIAIR, or to a powered hub that is connected to the ASIAIR. For testing, remove all accessories from ASIAIR other than the camera.
Try some snap-on ferrite chokes on the USB cable. There are USB cables that come with such chokes already built in -- they look like a cylindrical bulge near one end of the cable. The problem is that sometimes, depending on the conducted EMI, the chokes can make the problem worse, so you just need to experiment. There are chokes for different cable diameters at Amazon. Just look for "snap-on ferrite choke."
If you are using the third or forth generation ASIAIR (both are called "plus," so saying "plus" does not uniquely identify the model -- the older ones use the Raspberry Pi Compute Module 4, while the newer ones use the Rockchip), see if you can remove the antenna, and terminate the SMA antenna output with a 50 ohm SMA terminator (make sure it is a 50 ohm terminator and not an SMA short), and connect the ASIAIR though Ethernet instead -- this will help diagnose whether your problem is RFI related.
At the least, even if you don't replace the antenna with a 50 ohm terminator, try the Ethernet route to see if matters improve -- your problem must just be related to a poor data link between the the ASIAIR and the tablet.
In any case, keep the camera cable as far away from the ASIAIR antenna itself.