OK here is when it sticks on the rotate.
1) new board
2) click on shell for patterns on right side
3) choose a pattern, and place on board
4) click on rotate
Note rotate does not highlight, patterns on right side are removed. Select
arrow is highlighted, but rotate is still the cursor.
Fix click on zoom, pan or rotate to highlight, then click on arrow for selection tool (cross hair).
Seems to happen only when the pattern leave on the right side.