Mosquitto working but won't load devices

[gpbenton (Graham)]

I think you may be experiencing this issue

Mosquito MQTT update v3 broke my hassio

I just did the mosquito v3 add-on update on my rpi3 and in the add-on log there wee errors disconnecting all my clients saying they were unknown. Tasmota clients are reporting error 5. I tried a hassio reboot and don’t even have samba access now. I can still ping the hassio IP address. I was running 0.81.6 Do I need to do a snapshot restore and will it restore with version 2?