New Versa went flat overnight after the face lighting up like a torch

[EvMB]

APOLOGIES:  I received an error message when i first tried to post this and didn't realise till later that it had actually posted the first time despite the error message.  I don't know how to delete this second posting.

.I got my new Versa 2 days ago.  I took it home and fully charged it then started wearing it that night.  The last time I looked at the battery level, yesterday midday-ish it was at 84%.  During the night I woke a couple of times and noticed the whole face of the Versa was a white light - it was like a torch.  I pressed the left button and the light went off each time.  When I woke this morning the Versa was completely flat.  I get that the face of it lighting up like that may have used up the battery, but I'd like to know why it did that.  If anyone can help, I'd really appreciate it. Thanks 🙂
My mobile is a Samsung Galaxy A5

[EvMB]

Sorry, this posted twice because I received an error message so I tried posting it a second time.  I couldn't see where I delete it.

[SunsetRunner]

Recharge of course but then try a Restart and do it several times if necessary.

[SunsetRunner]

Incidentally, you may encounter other problems also since your phone is not on the List of Approved Devices.

[EvMB]

OK.  Thank you.  I'll just have to see how it goes then.  Maybe I'll remove the app from my phone and just use my computer..

[SunsetRunner]

That's what I do and there are no problems.