Regarding that "the queue seems to think that all the tracks you had it in don't exist anymore". What I have seen on my phone is that as soon as the app freezes, the playing queue is full of entries without content. You can scroll through it, remove elements, remove all, nothing changes.
Although it is very hard to determine how long the list actually is, as you only see the element you highlight briefly when scrolling -> the rest is black.
Regarding that "the queue seems to think that all the tracks you had it in don't exist anymore". What I have seen on my phone is that as soon as the app freezes, the playing queue is full of entries without content. You can scroll through it, remove elements, remove all, nothing changes.
Although it is very hard to determine how long the list actually is, as you only see the element you highlight briefly when scrolling -> the rest is black.