Suggestions

I'm surprised this hasn't cropped up before.
Sometimes you get a new hot match with a previous contact. Nowhere in the invitation to contact this tree owner does it say that you have previously been in contact, so unless you happen to remember, you can end up sending a message again, asking to view their tree etc. I have had to inform several people that we have previously been in contact, and can still view each others tree.

Is there any way that 'previous contact' can be noted whilst viewing hot matches?

I have not noticed recently but there used to be a line "you have previously contacted..." under the "send" button
Has it disappeared with the various other bits in the changes ? :-)

Just checked and the message is no longer there but the list re previous contact on the right hand side is there "Yes" or "No"

Yes, that yes/no is still there on the front list, but if you 'view' a match, then go on to the next match without returning to the list, there's no indication if you are in contact with the next match. Then if you return to the list, it changes positions and you have to start again.

Agreed, grannyfranny is correct.

In addition to showing Yes/No for contact on the front listing page, it should also appear when you drill down to the individual member details too. This would appear to be a relatively trivial, yet useful enhancement.

Nudge up for GR consideration