Fenix 6x Pro now going in to Power save mode at random since 20.60

Since upgrading to 20.60 my watch keeps flipping to power save without me selecting it… also randomly a double press of the back button will change to power save mode, any ideas why, seems no way to turn this off/prevent it.  Never happened pre 20.60 update?

EDIT:  Just added this from todays Heartrate data - you can see circled in yellow where the watch flipped to low power mode - Perhaps I temporarily exit the low power mode to be the same as ‘normal’ so it doesn’t change anything - i never use low power mode anyways