Canvas Randomly Goes Offline

My Meural Canvas II keeps going off line. It seems to ne at random times. Sometimes it will stay connected for days. I’ve when I check the menu I just show “Loading…” where it should report my wifi. If I go to Canvas info it says it is offline. Restarting the wifi service on the Canvas through the menu does not help. I can reliably reconnect using wifi protected service.

When it is connected my Home Assistant Meural integration tells me that the wifi signal strength is about -55dB. My router does not have separate SSIDs for 2.4 and 5.  I have reserved the device a static ip address.  My firmware is 2.3.2_3.0.3.

I use the device to display, on a random basis, my photographs which are loaded on an SD card inserted into the device. Everything continues to display correctly and the device turns on and off at the hours set up but when offline I can't control it remotely and Home Assistant automations fail.