Met this problem today at T3 arena, thunderfist. A voltail burrowed and came out at the other side of the gate and ran away, therefore we're unable to finish the stage.
Met this problem today at T3 arena, thunderfist. A voltail burrowed and came out at the other side of the gate and ran away, therefore we're unable to finish the stage.
Ever since the last few patches there have been reports of wolvers (all variants) being able to burrow and appear outside the normal bounds of the playable area.
This was supposedly fixed a patch or 2 back but as you just reported then it seems it does still happen though rarely. Try filing an in-game support request to contact an available GM to help you finish the stage should it happen to you next time around.