On my 1.9.2 standalone installation data provenance is working correctly for a few days then after some inactivity on the server all the data provenance in all individual processors and in the general reporting stays empty, even when I send new data through all the processors. When opening a data provenance menu I see a very short popup menu appearing, but it closes for me too fast to see what is going on.
On disk I still have 145GB available.
The problem goes away when I restart the Nifi instance, and pops up again after a few days.