Eclipse / Nightfall bug, not the same as known bugs

[maefly2]

Registered to post, I'll give as much info as I can.  I checked the known bugs, this does not appear to be the same issue, but it may be related.

AI plays Vampire, enters play correctly as 4/3.  AI later plays Nightfall, Vampire is now 5/4 (still correct).  AI plays Eclipse, Vampire now 6/4 (still correct).

Here's where it starts to go awry.

I put a Pulverizer into play and eliminate the Eclipse.  Vampire still shows as 6/4 (incorrect) - the two Nightfalls are still in play.  On subsequent turns, I eliminate one Nightfall per turn.  With the elimination of the second and last Nightfall, the Vampire becomes 5/3.

Hope that helps - I likely won't be back to check replies.

[Jumbalumba]

Verified for my side (as in not opponent). I even found out that after destroying the/all Eclipse (with Nightfall still in play) then playing another Eclipse led to an increase in 1 attack to all affected. So this could be done indefinitely (subject to card constraints).