Battlegrounds: banked missions not available

I tried to rush to level 40 before the season change, but was stopped short by my banked missions not appearing in the log. The UI says I have 26 banked, but the third mission slot just read “new mission in 3 days”. This puts a damper on my plans.

Is this intended behavior, or just a bug?

Did you find a solution for this? I am in the same spot. Third slot not available with 20+ missions banked.