Automatic Stop

One annoying thing- when I'm recording from a secondary device, the device picks up all the sound and records the calls without issue... but many times I will end a call and then go do something else and forget to stop the recording... then I come back and find 2 hours of calls recorded that had nothing to do with the initial call... many times there are moments of no sound... When I look at the sounds similar below, seems the same request came in 2 years ago, and again a year ago... so... ?