SW2017 SP2.

While working to deal with the fallout from this post​, a new problem has reared its ugly head.  Long ago, I blockified areas of our drawing title block so that I could easily change out things like company logo, and ensure consistency across the various drawing sizes.  I've made a brand spanking new drawing template using the process described in the aforementioned thread and I was going to simply drop my existing blocks into it and I would be all set.  However, when I insert the blocks, all the static text is missing.

Instead of this:

I get this:

Note: the file names are A DRAWING and A DRAWING-2017.  The text in the second image has wrapped.

Anything linked to a property shows up, but nothing else.  If I edit or explode the block, the static text appears.

However now *all* text is unselectable: static and linked.  Window selection only grabs the lines.

After a lot of WTFs and a lunch break, I've discovered that you cannot work with blocks in the .drwdot file directly.  You have to make a new drawing, get it all looking like you want, and then save it as a .drwdot file.  This is new behavior in 2017.  I can perform the same test in my 2016 .drwdot files and everything works as expected.