RootKernel, have you tried variations on moving around the TileMap extensions from your HWA folder vs main extension folder vs unicode folder?
I had a similar issue with the 2.5 beta, and found that the runtime appeared to be drawing the extension from the wrong folder. But I can't remember what the problem method to fix it was, but if you back up yoru extensions and start doing the hokey pokey with them you might find a method that speeds it up
the basic jist iirc was that the non-HWA version was being loaded somehow thanks to 2.5 being unicode. If you try just copying the HWA version over, that might do it, or I dunno