I think it is a steemdb.io issue.
I consulted my favourite data pool ;-) (https://steemworld.org/rewards-info):

Example upvu:

date	curation steemdb.io	curation steemworld.org
2023-03-09	5.1 MV	10.8 MV
2023-03-08	5.9 MV	10.6 MV
2023-03-07	7.5 MV	10.5 MV
2023-03-06	10.7 MV	10.7 MV
2023-03-05	11.9 MV	11.9 MV
2023-03-04	10.5 MV	10.5 MV

I think it's pretty clear. Since 7 March, the numbers no longer match.
Unfortunately, I have no information on how steemdb.io gets the data, so I have no guess as to what might have gone wrong.