I've tested it with my SBD as well and it is not yet working. I contacted Polo once again to ask for more info, but as usual, they either will be silent or tell nothing. However, I believe they will credit all Steem/SBD to their wallets in not time now. It was about time... Steem needs to grow now. Also, there is a nice arbitrage on SBD in Polo for the ones who are fast to act.