Hi, sorry if this bug has already been reported, I only saw reports about the offering itself.
I finished the 3 firsts orchestra but the orchestra of Lima Pulu simply doesn't "open", as if I didn't finished the previous ones. I waited 2 or 3 days after the last offering in case I had to wait but nothing, I even had the reward for the last orchestra, meaning that the game acknowledged the completion.
It's not my first save, and this is the first time I have this issue.
I play on PC, on steam.
Have a good day and sorry if there are mistakes, English is not my first language.
#Orchestra of Lima Pulu not working
placid silo
sonic bough
Hello @placid silo! Thanks for reaching out to us. 
Could you let us know the in-game date when you completed the last Orchestra? Also, if possible, could you share a screenshot of the Orchestra quest in your Journal? Thank you!
placid silo
Hi ! I restarted my backup save twice in the meantime and I found what caused the bug ! When I skip the cutscene after playing the song the next altar doesn't trigger, the second time I watched all of it and TADA the next offerings are available. It wasn't a big issue for me as I didn't do a lot of things during this in-game week but at least you know ☺️