I'm working on a vmix controller in Elm, and found what I think is a bug:

“SetMultiviewInput” accepts a value in the form: “int,int”, but that’s actually an invalid http query. It should be “int%5C%2Cint”. And the language I'm using sanitizes queries, so I’ve had to resort to hacks.

It seems like this API query probably needs to continue taking the old, invalid format, but should accept some other format as well.