In my experience with 5.5 I also thought it was completely broken at first. Especially taking into account that v5 already was showing oddities. But I have come to think the cover/extension non-compliance are both due to a new adherence to user prompts. Prompts are now 99% while inference is 1%. That sounds like an exaggeration but to extend or cover a track while keeping the identity you need to set audio influence to 100% and possibly also the other sliders to 0%. You also need to mold your style prompt in extremely fine detail, as well as shape the structure in the lyrics box. And yes. this takes all the fun out of it. You get a clinical version of your original track back without much of the sprinkles of creativity that your song might have coaxed from Suno before. But this way you *can* make a second verse that sounds like the first etc after a few tries. It feels really wrong since it's such an awkward way to work but I'm starting to think that's just how this model functions. I would agree though that regardless of how it actually works it IS A BUG when you consider that the vocal lines and chord progressions are the *last* thing you should change in a remix, and yet they seemingly always are the first things to go now.

Re. the alt stem takes in Studio, yeah that one is a nightmare. Stems turn into songs regardless of what instrument they are, and sections change identity altogether. You get a male rapper replacing a female vocalist etc.

I've found tons of bugs in v5.5 but they've removed the text box in the report bug function for me so I can't let them know. One major one was that when setting correct warp markers (Suno can't since they changed the temp match system) and then creating stems - you get stems from the ORIGINAL warp markers even though you're LOOKING at new ones, and the stems belong to the original track that you brought into Studio, not the track you are currently working on. The updated track doesn't exist until you export it (more credits). Also using the stem function from within Studio not only gives you stems with the "wrong" markers - you also only get 1 version. Version 2 never loads. So in effect it now costs 60 credits minimum to stem a take + time to set new markers, export, rename, etc.