Everything you describe is reproducible on my end.
Thread 0 Crashed:: Music main Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x191297720 __pthread_kill + 8
1 libsystem_pthread.dylib 0x1912cff70 pthread_kill + 288
2 libsystem_c.dylib 0x1911dc908 abort + 128
3 libswiftCore.dylib 0x1a244046c swift::fatalErrorv(unsigned int, char const*, char*) + 136
4 libswiftCore.dylib 0x1a244048c swift::fatalError(unsigned int, char const*, ...) + 32
5 libswiftCore.dylib 0x1a2433de4 swift::swift_dynamicCastFailure(void const*, char const*, void const*, char const*,
... plus 850 more line of stack trace and reporting.
The two fixes you mentioned work. I can view the playlist "as Songs" OR add an album title to a song without one when viewed "as Playlist".
In my original post, I wondered why this only happens to one large frequently used playlist and I observed a detail. Create a new playlist with File -> new -> playlist and name it. Put a couple songs in it and the playlist UI will have a row for Song, Artist, Album, and Time at the top.
![](https://discussions.apple.com/content/attachment/ea656e83-0fc0-4e05-a071-7a72f9025b0d)
I can move songs around in ANY playlist, with or without an album title in the meta data, that has these four columns. My playlist in question does not have the "Album" column.
![](https://discussions.apple.com/content/attachment/b56bb1a3-046b-413d-ac69-c52fec0f132a)
I can only move songs around in this playlist that have an album title OR I have to view "as Songs". To get around this. I created a new playlist and added all the songs to it. No good. I've identified three songs that, when added to this list, remove the "Album" column from this new playlist. When I add any of these three songs to another playlist, they do not have any effect on the "Album" column. My new playlist is 600 minus those 3 songs and works as intended. Yes this took a while as I transferred them in small groups. Still digging but this seems like a Swift UI issue like you mentioned. The three songs in question all have title, artist and album titles.