How to enable customer account number masking on all receivables transactions?

Summary:

We enabled system security option to mask all bank account numbers (screenshot-1). While it is working on most of the pages, we observed that our custom AR Inquiry role is still able to see complete bank account number (screenshot-2). Is this a bug or is it an expected functionality or is there any way to achieve this restriction except for page customization?

Even though we have enabled full masking, the entire bank account number is visible:

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