This issue seems to happen randomly but others have had the same issue. I will try to mine packed ice with a silk touch pick (or normal ice as well) and a couple things happen. #1 the packed ice breaks instantly (which it shouldn't) and #2 nothing drops. Best I can describe it, it's like breaking a piece of glass in creative. I've tried a different silk pick/tool and same thing. Not sure what causes this to happen.
Downgrade to 1.7.10 client. Mojang changed packed ice in 1.8 making it 'glitch' as we are still a 1.7 server. Basically what's happening is your client thinks the block should be broken and the server is thinking it shouldn't.
I was actually going to reply back with that lol I switched back to 1.7.10 and it was fine. Thanks for the help I'll remember to stay on that one when mining packed ice.
