Thanks for the video, I now finally see what you mean. It seems to happen when you scale a region extremely large in one direction. It doesn't happen here, but might be dependent on some scale setting. We'll fix that.

But it seems that neither I nor other people can confirm your other region problems. Regions are supported in all editions, with exception of the region_set command, which is Pro only. But region_find and region_check work in all versions with both WED created and script created regions.

Please check again. If you can't find the problem yourself, please contact Support and send them your project where WED-inserted regions don't work. They'll look into that.