Incorrect standing for Plague Star run (Probably affects all bounties)

[Yotanido]

Just did 5 runs of Plague Star before going back to Cetus. We filled up the toxin things every time, so this should have given me 15,250 standing. Instead I got... this:

 

I gained 7,050 standing and now have... 4,350? What? (And all that in 0 seconds, too! Amazing!)

 

Before returning to Cetus, it was displaying properly. Is there a reason rewards don't get saved when the bounty finishes, and only get saved once you return to Cetus? There are so many instances in this game where you lose your rewards - it would be nice if some additional safeties were implemented.

Railjack missions do this well, why don't open world bounties?