iOS app locks up. On restart, the queue resets

[detox665]

Plan

Free

Country

 USofA

Device

(iPad mini)

Operating System

(iOS 12.1.3)

Spotify App

v 8.4.90 

After pausing the music and switching to a different app, the Spotify app will occasionally be locked up when I go back to it.  No response from the play button.

Eventually, the app will restart or close.  Alternatively, I have closed the app manually.

When the app is reopened, the queue is completely cleared.

Typically, I will have a playlist running (i.e Daily Mix #x) and then will add other tunes to the queue.  The above occurs regardless of whether a playlist is running or if I have things in the queue.