Update for media_player is already in progress error

Configuration
1

I keep getting this error for all my Sonos media players
“2017-06-18 12:18:23 WARNING (MainThread) [homeassistant.helpers.entity] Update for media_player.xxxx is already in Progress”
They all work okay but still curious.
Anyone knows what it means?

2

Duplicate for 0.41 and sonos update is already in progress error