Kpb321 wrote:That is from an add on. Pet Journal Enhanced I think as odd as that sounds but definitely an add on.
I use Pet Journal Enhanced and I've never seen that happen when a pet dies.
If it still happens after you tried disabling all pet battle addons then maybe you missed one? Maybe try disabling all your addons and then re-enable them in small groups, testing in between to see what happens. I use Battle Pet Count, Pet Battle Teams and Pet Journal Enhanced and none of those does that as far as I know, unless it's some option I don't use. Maybe check where you downloaded them from and look at the screenshots to see if you can identify it?
Only other option would be to wait and see if someone here knows exactly which addon does that.