Same issues here. With 0.37 everything runs really smooth. After the patch 0.42, my whole group (6person) needs a long time to connect. And finally when we are ingame, we cant open dors, cant take any Items or even can´t use our guns to defend. 2 of us get hit by an zombie and we are not able to bandage them. Both die instead of the bleeding.
This sucks very much