You can try adjusting EDID settings on the Webcaster X2 as well. With an HDMI monitor and USB mouse connected to the X2, click on Preferences, scroll down and click on EDID, select the “progressive only” option, right click back to the main screen, power cycle the device. Once the unit has successfully booted, disconnect and reconnect the HDMI cable from the Webcaster. If the signal being output from Blackmagic is proper 720P or 1080P the signal should appear.
Black Magic does sometimes ignore progressive/interlaced changes if it sees an interlaced video source connected to its input, so it’s possible that could also be a cause of the issue.