No new posts since last night

[#1]

How strange is this.
I logged into the forum about 15 minutes ago and there was 1 unread post since last night.
No way, I thought so had a look and there are lots of posts this morning but the only unread posts I am seeing are those made since logging in.
Normally there are 1 or 2 pages at least.
Oh well....on with the day.

[#2]

You didn't have the forums open on a different device eg phone/tablet did you? I sometimes see the number of unread posts will reduce if I do that.

[#3]

No I didn't Chris.
Sometimes I've had a look via my phone but not for a few days now.
I've had blocks of unread posts go missing before but not on this scale.