X-forwarded-proto contains multiple protocols

I’m running into an issue with the way Glitch is setting the X-Forwarded-Proto header. For some reason, it’s being set to “https,http,http” whereas the particular server I’m using expects a single protocol. (Accessing my endpoint by http causes the header to be set to “http,http,http”.)

It’s not a standard header, but I can’t find any other examples on the web of people setting it to a comma-separated list, instead of just a single protocol.

It looks like it was added to Glitch [here](support glitch com/t/x-forwarded-proto-headers/181).

Any chance of having the behaviour changed so it’s just a single protocol?