Sometimes when setting up flights, I get no confirmation that my new flights have been set up; it just loads the route page again with no changes, like it just refreshed or something.
It seems to happen to certain routes (later found out that it happens on most of my hub-to-hub routes as well as some routes to major cities): I have been trying to set up additional frequencies on my CDG-LYS route for 30mins with no luck; however when I test-add a frequency to a different route (CDG-LCA in this case), it worked like normal.