Recorded regions not always drawing in real time (Ardour/Mixbus, Linux)

When I record, sometimes the regions do not draw in real time. For example, if I record drum tracks, such as 10 tracks at once, some tracks draw in real time and some do not. This has happened with several earlier versions of Ardour and Harrison Mixbus. Now 9.2.0 I use Linux. This has happened with Ubuntu Studio and earlier also with AV Linux.

Additionally, the record button does not always turn red, even though recording is actually enabled. However, the audio is recorded correctly on those tracks. When the recording stops, the regions are drawn correctly.

They are never drawn in real (wallclock) time. Record regions are updated once data is flushed to disk, usually every 5 seconds.

What I mean is exactly this: on some other tracks the regions appear about every 5 seconds. But on the tracks where they don’t, they only appear and become visible when the recording stops.