Bluetooth disconnects and reconnects even if I am close to my phone, is it broken?

Hi I have a Vivomove style and the watch alerts me that Bluetooth connection is lost and then in 2 seconds alerts me that it is connected again, although I sometimes have the phone in hand or very close to me. I'm pretty sure it shouldn't do that. Does this mean that the Bluetooth from the watch is broken and it keeps loosing the connection and then regains it?