1) I entered during zone2 as a client (non-host), had 2028 remaining standing to gain (my cap for red veil was 26k/44k), after getting 1014 standing, i've stopped gaining anymorestanding.
2) I'm killing 150 enemies per minute, (around 300 round 1), go through portal, start killing, host leave, host migration happens, I keep killing until end of round 2, but no more standing gained in tab-reward screen, and neither in post game (orbiter syndicate terminal).
Happened today 2-3 times.
Same build, mirage prime, prisma guard 4 + phantasma prime (no drifter used).
Public matchmaking with random 4-man squad.
Enough of remaining daily standing to gain more. Enough of space in syndicate's rank standing bar.