I’ve had the same problem. Last series recording was on 6/10/2020. No shows from that series recorded since then, in spite of my best efforts to make sure the computer was logged in, and even trying PMS as a Service. Now I seem to have an additional error, reference
The device does not tune the required channel
I noticed this after I noticed that the DVR series recording stopped. Looks like two separate, unrelated problems, with probably the same effect.
This is with PMS for Windows 10, literally just installed the latest version Version 1.19.5.3112 minutes ago, so let’s see if this fixes it.