Secondary character don’t get XP from missions, after hitting level cap on primary character

Platform: PC

Description: Started the game over again back in december. (Deleted all previous characters, not my save file.) I did all the game’s main missions and most side missions with my first character. When it hit lvl. 31, I made a second character to start leveling up. At this point, all the missions I had left were one side mission from Alpine Unrest, and five side missions from FNIX Rising. None of these missions granted any XP upon completion. Every mission I did with my first character gave the XP reward as normal. Also note that I have only «tried» this on side missions.

Steps To Reproduce: Could try with a third character, but I’ve got no more missions to try it on.

Images / Videos: Could record if I had more missions.

Host or Client: Host

Players in your game: None

Specifications:
Intel Core i7-4770K, 3,5GHz
DDR3 RAM, 32 GB
GTX 1080 Ti GPU, 11 GB