Slitherine

Bought the game on a Friday and been engrossed in it all weekend. However, I've never been able to complete a campaign as either side because once I get to around to turn 20+'the game freezes. Despite constantly saving, as soon as it gets in to naval moves with an attack it goes no further and freezes. Help, advice even hope would be appreciated please, is this a common issue on the iPad?

For info I'm playing off iPad Air 64gb.

I'll have to take it back - the issues I had that is. Since posting I've completed four campaigns successfully and thoroughly enjoyed them. The issue I had seems to be isolated to naval moves. Great game!