This is the 2nd PCB with that bug. The Autorouter is working fine... but after adding text on the TopSilkLayer... the Autorouter "hangs". I've tried it with the latest Autorouter Version (downloaded today). I never can rescue the whole PCB. Everytime that happen, I have to create a new PCB from scratch! Thats very annoying. I've tested it also with the Online Autorouter...here this bug is not happen. So it seems, that you are running a different version of the "Cloud" Autorouter as local Autorouters.