I mean, I get annoyed when I see the same thing posted to two communities back to back, but 5 is ridiculous and extremely poor fediquite.
Edit: Seems the poster is some kind of spam bot. As one commenter pointed out, they seem to have spammed this to any community with “music” in the name. And it’s more than shows up in the screenshot. A LOT more.
It would be nice if we could specify a priority list for communities (each user creates their own). If a post is crossposted to multiple communities, only the one posted to the community with the highest priority gets shown on the feed.