[Observium] Sensors changing precision/scale

Has anybody encountered devices that change their scale/precision whenever they feel like it?

We have some that now behave this way after a recent software upgrade. We think it's a vendor bug (in this instance, Bluecoat), but might be prudent to catch the changing precision value during the poll.

Currently it looks like the precision is detected once and stored in the db. Then subsequent polling is only adjusted based on the original precision value.

I've attached a graph and some walks showing the behaviour...