RB20 Appears Good but seems to Fail

I have an RB40 and 2 RB20s.  We had some internet issues, with the ISP and after all fixed, one of the RB20s shows Backhaul as Good but every time I use something attached to that RB20, that device fails.  For example, when my cell is in range of the RB40, WiFi works fine.  When I am switched to the RB20, WiFi fails.

I am running the current version, 2.7.5.6, Orbi firmware.  

Is there away to reset the RB20 and reinstall the firmware to see if that fixes the problem?  My other RB20 seems to be fine.