Steps to reproduce

• Shift-click until you are on the very edge of a block (i recommend you use the same conditions as in the screenshot, this is very hard to explain)
• The edge must be that of 2 blocks, a grass block and tall grass so that you sort of fall onto the tall grass without falling into it (as you are on the edge of the grass block), also works with flowers/sugarcane/water/lava instead of tall grass
• Will produce the wrong particles