Bug in Sub-account Transfer History (For Sub-account)

“Sub-account Transfer History (For Sub-account)” is not working.
It always returns an empty value, like we have no transfers in sub-accounts.
But if I use “Query Universal Transfer History (For Master Account)”, I see all transfers to sub-accounts.

if the transaction was done by the Universal Transfer endpoint, then you will need to use the Universal transfer history endpoint to get the results.

I want to be more specific regarding the issue,

We have a master account with multiple sub accounts. We are looking for a way to read via API all transfers made from Master - to and from Sub. It seems that the API is not working correctly - or we are missing a route to ask the SUb account API regarding transfers received/ sent with the Master account.

Any advice would be highly appreciated.