Mask issues

There are a couple of issues I've encountered with masks since the latest update.

1. I can no longer create bezier handles by clicking/dragging when creating new mask points, nor can I drag select multiple mask points once the mask is created.

2. There are strange transparency issues related to feathering at the edge of the frame, even if the mask and footage both extend well beyond the edge of the frame.  *screenshot attached

3. When keyframing my mask position, e.g. for a wipe transition, the masked layer will behave strangely (appear to have greatly reduced opacity even if the opacity is at 100%) until the mask fully fills the frame.  *screenshots attached showing 2 consecutive frames with no opacity adjustments