While visiting friends today (strict social distancing!) for the first time for months we saw a new local community garden. One of the plots had broad beans with distorted leaves where horse manure had been used. It looks very much like damage from the herbicide aminopyralid.
Aminopyralid passes through the guts of animals and into the manure. It is persistent and only breaks down through the action of soil microbes. It was first reported in 2008, banned for a while and is now back. Why was it re-approved?
That is why we have a zero in/zero out policy here and reply on making our own compost from garden and kitchen waste.