dirtyFields in formState turning fields outside the FieldArray to dirty true when FieldArray append is called

[Galapp]

Hi all,
I am running into a weird issue where i have a complex form that also has a fieldarray configured in it. For some reason whenever I append a new entry to the fieldArray it turns some of my fields as dirty true even though they werent touched. Here's an example:

https://codesandbox.io/p/sandbox/usefieldarraydirty-issue-lm8hcr

Why is "textBox" dirty if it wasn't even touched? regardless of it having a default value or not, if the field isn't even touched and its value wasnt changed, shouldnt it remain not dirty?

in a much bigger implementation I have, there are no default values at all, and yet some fields decide to turn dirty true and others don't.