Thanks. Im using latest Windows 10, latest non-beta Studio 4.9.3.166, and latest VWD and bridge since I just downloaded them last week for the first time.

To reproduce just add a DS primitive sphere with 20 or so divisions into empty scene, then add a plane with 20 divisions, start VWD, convert sphere to collision, convert plane to cloth, turn off subdivide, and run the sim. On mine it locks with hourglass