What does this mean? When I hear hub reset… I get an uneasy feeling. I hope you are saying you powered it off for 15 minutes???
There have been some hue issues so not sure if your issue is related: https://community.smartthings.com/t/uk-v2-hub-not-communicating-with-hue-devices-june-2023/264437
You may want to open a ticket with ST support.