Why does a URL-like query param changed from "http://..." to "https://..."?

Question

I want to send an unique constraint, which unfortunately looks like an URL. My unique constraint string looks like this:
http://192.168.1.1:8086/testOrg/testBucket

I pass this UC in the query param of a delete request:
https://localhost:5001/api/settings?uc=https://192.168.1.1:8086/testOrg/testBucket

The crazy thing, which i do not understand is the fact, that the URL of the UC changed from "http" to "https".

I tried to add letters in front of the UC, e.g. UChttp://192.168.1.1:8086/testOrg/testBucket but event this changed to "https".