When selecting multiple pages of results, I cannot remove a label from all of them.

I have three labels, A and B, C.

I have 2000 emails, some tagged 'A', some 'B', some 'C', some a mix of all three.

I want to make sure that any labels tagged as 'A' are not also tagged 'C'.

I go to the page for 'A' and click 'Select all', the first 50 emails are selected.

I click the labels button.

A, B, and C are all marked as - in the tri-state checkbox.

I click 'C' twice to unselect the checkbox and apply - 50 emails are now still marked as A, maybe still marked as B, and NOT marked as C

This works as expected. If however after clicking 'Select all' I then click the button to select ALL matching emails labelled A, not just the first 50, the tri-state checkbox will not let me deselect - I click once to tick, then when I click again it goes back to -.

This means that if I want to remove a label from multiple pages, I have to do it page by page.

It would be good if the tri-state selector worked the same way across multiple pages as it does for single pages.

Thank you