Have some issues with fenix 7x pro solar

I bought my fenix 7x pro solar a week ago. Today for some reason the watch was entering  sleep mode all the time, I check the schedule  hours and days was ok. Finally after I try many times to find the solution, I enter schedule  again and edit the day and time, and without to do any chances I save it again and from that time the watch was not entering sleep mode. 

After I came home I left my phone on the table and when I walk away no more than 6-7 meters my watch connection was off. I try it in different places in the house and outside and is the same. Please can you help me?

Sorry but my English are not very good.

Thanking you in advance