Thought that would be the case Ozzy
The wishbone arms would have certainly pulled where the arms join the threadded boss.
I am going to cop some flack for this but being as they have been nicely powder coated I would be tempted to give them a little tweak cold, should be enough flex in the powder coat not to crack.
A mm of movement at the boss joint is several by the time it is measured at the end of the arm
Edit to add
You could pre warm the wishbone in an oven, just take some care not to exceed the melting point of the powder coating.
This may help just a tad in relieving the stress of the steel.