Still happening in the second 2.5 PTR, this is a fairly major annoyance for summon druids.
I have a “ritual” where I summon everything at the start of a game and if something fails to summon then I have to go back and recast it, completely throws off my rhythm. This also goes for anytime I’m resummoning Ravens in combat.
^ This is also still an issue which can be quite annoying. I like to teleport + shapeshift to lay down Shockwaves, it also throws my rhythm off if I get the failed unshift.