This is from Renaissance + Base game scenario:
The bug appears when both players have activated Capitalism project and then one players plays Bandit and two money-yielding action cards pop up. Neither player is able to choose the one for trashing and both players get a message that it is the other persons turn to choose (i.e. "waiting for player B").
Thanks for the report, dmi3kno!
I checked your recent game with those cards, and I found no problem. Once one player has played the Bandit, revealing Spices and Priest, the other could select to trash either and the game continued.
OTOH, there are more reports of players seemingly loosing contact with the server, which this one looks like as well (both browsers thinking the other had to do something, but the answer not flowing from the server to the disconnected brwoser.