This only started for me today so not sure if anyone else has experienced it yet. Today I sent a bunch of my pets on missions, and I kept logging in every so often to see if they were complete but my tab never lit up. I actually had to go into the mission tab to see that almost all my missions were done and had been for quite some time, but again the tab wasn't the orange color it usually is when missions are finished, just the regular white.

Let me know if this issue persists for future missions or was just a one-time thing.