AutoNotification Get album art from Spotify

I have a task that is queuing a spotify notification to get track name and album.
This works great.
As does the grabbing of the actions.
But I'm finding that getting the album cover is very unreliable.
Very often i get nothing returned.
And if I do get the cover art. If the track is paused and restarted it can't be retrieved a second time
Has anyone else experienced this?
Has anyone successfully and reliably managed to get the album cover?

FYI it's to use in a scene

 

This is the task description (the scene Jjj is just a test scene with an image element to prove off what I am trying to do.
Had the same problem again over weekend this morning.
For some tracks it works, others it returns nothing or file:///null
And when I do get it to work, if I pause the track and set the image to nothing, it doesn't work when I restart.
My eventual final task is to have a profile triggered by Spotify intent receive for playback state changed and / or meta data changed.

Code (Text):

Music (97) A1: AutoNotification Query [ Configuration:persistency Type: Persistent Only
Notification Apps: Spotify
Has Reply Action: false
Get All Fields : true
Image Names : image
Big Image Names : big
Internal Actions Big: -1 Timeout (Seconds):20 ]
A2: Flash [ Text:%antitle1
%image
%big Long:Off ]
A3: Destroy Scene [ Name:Jjj ]
A4: Create Scene [ Name:Jjj ]
A5: Element Image [ Scene Name:Jjj Element:Image1 Image:%image ]
A6: Show Scene [ Name:Jjj Display As:Activity, Full Window Horizontal Position:100 Vertical Position:100 Animation:System Show Exit Button:On Continue Task Immediately:On ]

 

So I tried this and did some experimenting and here is what I come up with:
There seem to be 2 intents being used with Spotify

Code (Text):

com.spotify.music.playbackstatechanged

and

Code (Text):

com.spotify.music.metadatachanged

Obviously the metadatachanged intent is fired each time there is new meta data...this includes the first time play is pressed per 'listening session' and each time a track is changed.
If track is paused only playbackstatechanged is sent.
If track is restarted only playbackstatechanged is sent.
When the track is skipped during playback, both intents are sent...1st playbackstated changed and then metadatachanged.
So from this its clear that when a track is skipped, it is actually paused and then skipped.
BUT....
This doesn't seem to be the reason that my task to get the album art is failing.
Having added a wait action in before the query action I still see the same behaviour / results. I started with a 0.5sec wait and increased to 3 seconds and still couldn't get reliable results.
Skip track and album art is retrieved and will display in a scene.
Pause the track and art is cleared.
Restart the same track and album art cannot be retrieved and query returns file:///null.
Skip a track and next track album art is found OK and displayed in scene.

I am now thinking this is not truly a problem with my task or AutoNotification, but the way in which Spotify is creating notifications.
If anyone can spot anything that might help or where I should be looking thatd be great

 

Yeah, I also tried this and there is nothing.
It seems to me that when the meta data changes a new image is created. But when playback state stops, image is cleare, then when playback is restarted the image is not re-created.
Its a strange one.
And im now pretty sure its down to how Spotify is handling the notification and playback states.

Ill do some more tests and see if I can figure it out.