Specifically, it happens when the Replace button in the transport window is active and the recording is punched in and out with the key command for Toggle Record. The monitor signal then drops out for an instant as soon as the recording is ended (punch out).
Because the issue affects only the monitor signal, the audio is recorded correctly. It only occurs if the Replace option is active when record is toggled manually. It does not occur when using the Auto Drop function together with Replace.
To avoid the drop out of the monitor signal, disable Replace in the Transport Window. This will record the audio without replacing the old parts of the track. The newly recorded audio Regions will be placed above the old ones in the Arrange Window, resulting in only the new audio regions being played back. If needed, the sections of the previous recording can be removed manually or using the "No Overlap" mode from the local Drag menu.