Tracks not adding to playlist (nids not beginning with "T"?)

[JVMed]

The last few days I've experienced new problems with not all my nids being added to a playlist, for example out of a list of 115 nids only 14 would appear in GPM (if it matters all the tracks were released fairly recently). Looking through the nid list only 16 tracks had nids that began with capital T. However if I add each track's storeid instead they all appear successfully in the playlist in GPM. Here is one track found with mobileclient.search() that did not add to a playlist with its nid but did with its storeid

{u'track': { u'albumArtRef': [{ u'url': u'http://lh3.googleusercontent.com/aeFT0-EChHFb3rH1JHTGixVaAKzgAIHHfKh6BZRG9rmISVehhRcsXICaLtiTK2qJNKWTTFHMSg' , u'kind': u'sj#imageRef', u'aspectRatio': u'1', u'autogen': False, }], u'artistId': [u'sp4jilxe26d26cpptgi4ai6cfy'], u'composer': u'', u'year': 2017, u'trackAvailableForSubscription': True, u'trackType': u'7', u'album': u'Never Start', u'title': u'Never Start', u'albumArtist': u'Middle Kids', u'trackNumber': 1, u'discNumber': 1, u'albumAvailableForPurchase': True, u'explicitType': u'2', u'trackAvailableForPurchase': True, u'storeId': u'Tvi2dqrf4c6gh7zdfch3bdlo2au', u'nid': u'vi2dqrf4c6gh7zdfch3bdlo2au', u'estimatedSize': u'7889006', u'albumId': u'rtgsjtvlo24y7jnczxaabqsjxm', u'genre': u'Alternative/Indie', u'playCount': 4, u'kind': u'sj#track', u'artist': u'Middle Kids', u'lastModifiedTimestamp': u'1486175786462384', u'durationMillis': u'197000', }, u'type': u'1'}

Is it common for a tracks nid not begin with T? From my logs the earliest occurrence of a nid not beginning with T was Jan 2017.

[simon-weber]

I haven't noticed a change myself, but I've long since avoided using nids. They seem to change randomly. The storeid or track id are usually the way to go.