Custom Match Making Not Working

Custom matchmaking on PS5 (unsure if its all platforms) is not working, when selecting maps. Selecting the mode does work, but when you put 'Operation Firestorm' and 'Liberation Peak' it'll bring up 'Mirak Valley' or some other map that wasn't selected - obviously not the worst bug, but its annoying when you are trying to do the recon challenges with long headshots and get put into 'Siege of Cairo'.

Please let me know if theres any quick fix for this or if I'll have to wait for an update