I've moved some bytes within my wallet and I've noticed that after 15 minutes still the transaction did not fully confirm. I had never noticed that it takes so long. Which is the average confirmation time before the transferred coins become available?
Really, network congestions?
Personally, I have had very good experience with Byteball transactions.
I moved my Byteball so many times from windows wallet to Bittrex, it takes only seconds to appear on explorer.
I don't know what has actually happened recently with your transaction.