Is cnPulse firmware upgradable?

Seeing intermittent lost sync on a 450i (firmware 16.2.3) connected to Canopy UGPS/cnPulse software version AXN 5.1.1. I remember that issue a few years ago with all the sites losing sync - there was a firmware bug in that code revision. Is it possible to upgrade cnPulse firmware, and if so how do we go about doing that?

Any update from Cambium on this? Is it possible to upgrade firmware on the cnPulse?