I have seen this happen when the original Remote is 'Learned' by a universal Remote e.g. the Harmony. It happens because the the sequence is normally sent repeatedly on the original but only once on the learned remote. The solution is to re-learn the original command by holding the key down longer so that a repeat pattern is learned
It could still be something to do with the repetition of the sequence, although why the remote should start sending the sequence only once I couldn't say. You could check to see if the sequence is being repeated by viewing with a digital camera
Although he hasn't chipped in yet, I know a certain holographic phone number of my acquaintance has exactly the same thing. Which is why I raised it. At this stage I'm not so much looking for off-the-cuff hypotheses as data.
Trying to establish how common it is. I have already tried all the simple answers.
It is not a high-priority issue (I habitually use a double press to fire up), more of an annoyance. I have never seen the same on the HDR-FOX (despite switching RCs). I have a hunch it is related to the failed boot problem (if I try to turn on again too soon after turning off, the boot cycle crashes back to standby each time and the only way to get it up is to press the box button the moment the power LED turns red).
Only HD-FOX users can contribute useful observations at this stage.
It's a 3-digit remote I currently use with it. My 4-digit remote is elsewhere, I'll try it when I get a chance. Meanwhile I can test a programmed Harmony (when I judge the power-off to have been long enough).
Weird! It seems using an alternative remote has somehow reset my HD-FOX - after a long series of observations as stated in the OP, it is now responding to the original remote first go.
I cannot offer any rationale for this, the observations will remain on record on the off-chance somebody else sees something similar. It may be some time before I can test the same "fix" on another HD-FOX of my acquaintance.