Sleep and Recovery not calculated but detected hours of sleep and HR during the night

I am new and I started using Whoop 5.0 about 14 days ago.

First two night everything all good, sleep, strain and recovery were calculated correctly. Then, detection of the sleep is ok, I can see also HR and stress during the night but no Recovery and no Sleep are calculated.

I tried to wear the band in different ways but the results are the same. A week ago, I disconnected the band from the app and bluetooth, re-connected and re-started and Recovery/Sleep worked again but only for 2 night.

Has anyone had the same problem?