Possible Bug. (Golden)
I have been digitising my record collection, about 120 LPs. Very occasionally the play-through sound misses about a second, but the gap doesn't occur on the recording, so all is well.
BUT today two such events occurred close together and there was a gap in the recording. This coincides with disk activity, so I'm guessing you're writing to a temporary file and this is interrupted by Windows writing something to disk.
Maybe a cure would be to allow us to specify the location of the temp file, on another drive or maybe on a ramdrive?