Level #15 Energon Grimlock – complete dud!

Anyone else experience this weird glitch? I finally got Energon Grimlock to level 15 and played a "city" level with him. He performed worse than a Level 1...absolutely unresponsive, immediately lost energy and couldn't even destroy a wooden block...a quarter of the way into the level he died because he couldn't even get the red bridge light to activate and fell. Spending all the gems and coins to get him to that level and having a Level 15 perform so badly and weirdly is frustrating and unfair to say the least. Anyone else have this happen? This new update is just a crash fest....constantly crashing on desert, beach and river levels especially if using Glassor. Have lost hundreds of coins and gems and of course no response from Rovio. I play on a fully updated iPad Air.