Bluetooth does not automatically reconnect! Missing calls and messages!

My watch often does not automatically reconnect to my iPhone XS when it get out of reach.

Even though i sit next to the iPhone for hours, it's not reconnecting!

The result is, that i miss calls and messages!!!

This bug exists for me since i owned the watch and it's a shame that Garmin is neither willing nor able to fix this issue.

How do you handle that issue?