Your post reminded me it was still broke and I still had a sensor that failed paring. It prompted me to return to my hub… Still sitting there blinking at me in defiance. 
Did a soft reset: Unplugged “Running on Battery Power”, pressed the reset until the infernal blinking stopped and unit reset. Waited a couple.minutes for it to wake up and get it’s bearings. Back to the app. Added a new sensor thru the path: Home Monitoring>Home Monitoring Settings>Home & Away>Your Sensors…Add. SUCCESS! New sensor added successfully. 
Deleted the sensor from the app and verified it was gone in the home monitoring. Added the sensor thru the path: Home Tab + in upper right>Add Device>Sensors>Motion Sensor V2>Wyze Sense Hub. SUCCESS! New sensor added successfully. 
App Version 2.28.0.102
FW 4.32.8.213
Still frustrating that a device would require a physical reset after a FW update to operate.
Will keep monitoring…no pun intended.