Yes, it's unusual. Could be anything: tired, computer/connection issues, even 'flu. Hopefully, he'll reappear soon!
Mine has been rock solid since I moved from TalkTalk (who had taken over my previous ISP) had a new NTSE master socket fitted and positioned in this room 3.5 years ago, but the past few weeks have seen random drops of ADSL - still connected, just loses the signal briefly, and re-synchs at the same up/down speeds, SNR etc. It seems to happen at all sorts of odd times, so nothing on a timer causing interference, sometimes
through the night, other times while I'm actually using it, so not at all sure what it is.
Router and filter were both renewed a year ago (no guarantee I know) but nothing has changed, no new electrical items. I do get slow loading pages sometimes though, so thinking perhaps a DNS issue, but don't know enough about it.
Looking at Speedtest, I have a feeling I may have been moved onto a slightly different pop.
I hate when something works perfectly for a long time and then suddenly misbehaves!