With Orvar in play, opponent exiled the target (Shipwreck Dowser) of my spell (Irenicus's Vile Transformation) with Baleful Mastery in response with the Orvar trigger on the stack.

Orvar should have made a token copy of Shipwreck Dowser even if the spell I cast would fizzle, but no token was made.

This is the first time I have ever encountered an issue like this after many games playing with Orvar.