Maybe there is herbicidal contamination in one of the ingredients used to fill the bags.

The Bottom Line

• The best sources for pesticide-free compost are those that have been analyzed and certified. Home-made compost is also a good choice as long as you are sure your materials are contaminant-free.

• Unregulated compost can contain pesticides, heavy metals, and other environmental toxins that may be harmful to you and your plants.

• If you must have your lawn sprayed with persistent, broadleaf herbicides, be sure to use a mulching mower and leave the clippings in place. Do NOT compost them or bag them for clean green removal.

• Soil testing for heavy metals is crucial for any landscape where plants are grown for human consumption

The Myth of Clean Compost

https://s3.wp.wsu.edu/uploads/sites/403/2015/03/clean-compost.pdf

Thank you! Is there anything else that would create this kind of deformity?

Drift from any other herbicides that may be being sprayed nearby.

That does look to be chemical damage....but whether it comes from herbicide contaminated soil or compost or whether it comes from drifting spray or overspray is up for grabs.

Wilt