Historian returns different results for 28-day vs 29-day queries

Hi all,

Seeing a weird issue with data retrieval from one of our historians. The data from the past 29 days and beyond seems to retrieve normally:

But looking at it from 28 days looks like this:

I'm guessing it has something to do with the way the historian is partitioning the data as it looks different from a healthy sister machine.

Broken historian partitions:

Working sister machine historian partitions:

"Ignition edge 8.3.8" using store and forward to another Ignition gateway, "Ignition standard 8.3.9"