Can't synchronize VD tracks on Android app

[thiblasser]

Device: Sony Xperia Z3 Compact

Operating System Version: Android

Spotify Version: 49.0.992

Description: Dear all,

Since I update the app on my smartphone, I can't see the tracks that I imported from my PC to my smartphone. When I click on them, I have a message which explains that the tracks are not available. Why?

To reproduce:

1. Step 1
2. Step 2
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Workaround:

Additional information: