Title. I updated something on my list on friday, and now its been a few days but it hasnt updated that square. Now theres a gap in my perfect streak.
May I ask what you updated on your list?
Looking at your activities, you have on the 7th at 21:25:
Watched episode 13 - 16 of Sousou no Frieren
and on the 9th at 7:24 :
Watched episode 17 - 23 of Sousou no Frieren
So nothing on March 8th. That's why your activity is missing.
This might not fix it, but, do you have the correct timezone set on your profile?
Yesterday... I see three activities, all around half past nine in the evening, in my timezone. Yet I also see nothing in the activity history box.
There could be timezone issues, though I'd more expect that around a Sunday with activities closer to midnight... but I think it might just be this minor bug that fixes itself within a couple days...~
...Though that one usually happens with days with only one activity... eh, I'd still just wait~