Thanks for your advice. I had used the battery saver app and after long periods of innactivity, the app get closedFor starters open pebble app, then click on the 3 bar button on bottom of your phobe to show all open apps, drag down on pebble app and it will give you some options a cog and a lock, use lock to keep app open in background. This should now stop the app being closed by system. There are other setting, but it's just a case of messing about to see what works for you - through security/ battery saver app/ select pebble app and select no restriction etc..
It does work dude, thanks for the shareHi, I have the pebble app always open.
What I did : In settings/battery/manage battery usage by applications/choose application
Select pebble, background = no restriction / Localisation = do not authorize
Then, Security application/auto start/tuen peeble on
Working for me . pebble always on.