Agreed.
On the one hand, someone could argue she's portraying minority characters in the most acceptable way she feels she can but on the other...why is it always one of the first or only points she makes about a character? And it's often a repeated fact about them too.
She doesn't point out whiteness in Caucasian characters in the same way.
Again, someone could argue that her intended audience reflects the national demographics where white people are a majority, but its also a multicultural society in which racism has increased exponentially in recent years (and racist rhetoric gets worse each month).
Is there implicit belief in her writing that readers will assume a character is white unless it's explicitly stated? And therefore is she attempting to demonstrate diversity while backing off from other ways of writing about it which could leave her open to more criticism?
Does the fact that it makes some people who are white uncomfortable because it feels to them prejudicial actually say more about them (and I make no inference to your own race here)?
Are some white people only comfortable if they can adopt colour-blindness towards characters?
How far is the reader to assume character descriptions originate from the point of view of either Strike or Robin?
Notably, when Hermione was cast for the stage , she was applauded for pointing out she never explicitly stated Hermione-of-the-books is white but when she said Dumbledore is gay, she was accused of co-opting lgbqt+ issues.