This has been added to the development road map, but no ETA at this time. There is currently an open Idea for the feature here Recurring Tasks Auto Complete, I recommend voting it up to help give the idea visibility.
This is causing major issues for us. If not fixed soon we will be forced to find another solution. It has been an on going issue for quite some time. The fix seems simple. The votes to fix it are high. I can't figure out why they don't correct this obvious problem. Please vote.