In Hearthstone Battlegrounds, when playing Jim Raynor in a lobby with dragons and pirates, Tarecgosa doesn’t properly keep stats gained in combat.
Specifically, the deathrattle from Ship Master Eudora seems to prevent stats from being permanently kept. When Tarecgosa gains stats in combat from both the Battlecruiser deathrattle and Ship Master Eudora, none of those stats were permanently kept. However, when Ship Master Eudora and Charmwing gave stats to Tarecgosa, the stats were permanently kept (though this was the last combat, so not sure if that had an impact) (the Battlecruiser gave no stats to Tarecgosa during the last combat, so unsure if that interaction had an impact).