As one of my fellow bloggers Barry Ralphs (BazzaCAD Clog) said its been crazy here at work also. We've had most the CAD staff working on one project each day trying to get our selves back ahead of our projects. So I've been neglecting my posts. But no fear, I have many more Dynamic block posts coming in the future.
So, I've received many e-mails over the last 6 months about people having issues with hatches in dynamic blocks. Some advice I have is try two methods when your creating you blocks. First use the associative hatch "Pick Points" option to hatch in a desired area that you're going to apply your action to. Another option you can try is add draw in a boundary on a non plotting layer and apply you hatch using the "Select Objects" option.
All around I've seen many different problems with hatches. Some can also be fixed by simply doing a REGEN ALL to get the hatch to appear right. And some they need to be re-created??
TIP: If you're using a SOLID FILLED hatch pattern and having problems with you hatch patterns, a suggestion is you can use a old legacy command called SOLID aka 2D Solid. This will allow you to select a triangular, rectangular simple shape and shade it in with a 2D SOLID. This should work pretty well in you Dynamic block limiting the frustration in your block Authoring. Unfortunately if you want to use a different pattern that a SOLID FILLED then you're kind of outa luck. Hopefully the next release will fix some of these problems.