[Bug]: custom separators not using separator_selected highlight as they should and not being at very start or end of bufferline. about bufferline.nvim HOT 1 CLOSED

@Alan-Manning this might be something you can get working but it's important to clarify that this plugin isn't designed with complete flexibility of separators in mind which is why it actually offers specific options. I wouldn't say it's a bug because the colours that are used are quite specific and ordered quite specifically to work with the provided options. When a users is in the realms of adding their own custom shapes it needs elbow grease from that user to figure out if it's possible.

TLDR: Only the provided options are 100% supported using custom shapes is at your own risk since I prefer a few options which I can control the appearance of rather than hyper flexibility. There are definitely plugins that give users that level of control though like heirline. I built this to be much more out of the box, which involves a certain amount of taking what you get a bit similar to a GUI text editor really.

from bufferline.nvim.