Hmm that sounds weird - I have unfortunately not enough info to take it back to the devs except “pet disappeared”. However, once we have the UI and control for the in game log patched in (which should hopefully be sometime next week), you should be able to see more info about what happened. Then we can easier help you as well by getting more info back to the dev team. Right now, the event log is hard coded in what it shows and it’s set to only super close proximity (which you’ll be able to adjust to map wide).
I’ll make a note anyway so we keep an eye on additional info popping up. Sorry I can’t give a better answer atm.