We're using a custom tool very much like the example here:

However, when we try to update the rich_text with a value from the , we can see the field being overwritten again with the defaultValue.

When I debug the transformer, I can see it being called twice. Once when the product is selected, and another time when it wants to overwrite the rich_text field with the default value.

This happens every time I change the product. UNTIL I focus on the rich_text editor (click inside of it).

This also only happens with the first custom tool I add. Subsequent tools don't have this issue. And it also seems that when I start selecting products in subsequent tools, the problem goes away.