There is a small (but irritating) bug in the flashing cursor display when WPAT_SpaceBefore is set.
Try the following using the Demo WP. On the first line change the Paragraph Spacing Before to 0.10cm. You will see that the vertical position of the flashing cursor is incorrect on the first line. It is now too high. The new position seems to be aligned to the base line rather than the extent of descenders. ie aligns with the bottom of an 'a' rather than a 'g'. The position is correct on the other lines.
I have also seen the cursor raised above the base line when positioned at the end on the first line - although I can not reproduce this effect reliably.
In my application styles typically set WPAT_SpaceBefore to 6pt and it is surprisingly disorientating typing new paragraphs when the cursor is just a few pixels adrift.
I am sure that you will tackle this problem with your usual efficiency.