Songs missing from a playlist but when i add songs it shows all the songs are there

[PearlPo]

Plan

Premium

Device

iPhone 11

My Question or Issue

last night i created a playlist with almost 40 songs but this morning i woke up there was only 6 songs in the playlist and when i try adding a new song it shows that all the songs are in the playlist but i cannot find them.  also made this late at night so i don’t remember most of the songs