Mulch could be one of the major ways that jumping worms are being spread. Could you be bringing jumping worms into your garden spaces?
Jumping Worms - habits and prevention
Jumping Worm Threat To Mulch Still Without Merit
Dealing With Invasive Jumping Worms – A Gardener's Worst Nightmare
3 reasons for using wood chips in the garden
The Next Invasive Garden Threat? A Slithering, Jumping Worm – NBC
Jumping Worms in the Garden? What you can do to help! – Invasive
Jumping Worms: What to Do? - SET & The Mulch Store
Asian jumping worms: How to keep them out of your garden
Garden Mulch and Jumping Worms
Dealing With Invasive Jumping Worms – A Gardener's Worst Nightmare
The next invasive garden threat? A slithering, jumping worm
Which is the best around a house, mulch or pebbles? - Quora
How to Prevent and Remove Invasive Jumping Worms - Gardening
How to Identify and Remove Invasive Jumping Worms - FineGardening
Jumping Worms in the Garden? What you can do to help! – Invasive