The process I described was reproduced four times. No bug report is possible before disconnecting the camera, as HR does not respond to anything once the problem has arisen.

When shooting multiple stacks, in succession, Remote freezes up after about four or five stacks. The relevant number of shots is taken; the progress bar proceeds to 100%; then the program moves the lenses focus to the closest position; and then the program freezes - no change to the progress bar; no ...