Zoho Books: tax is not automatically pulled from product-data anymore - why?

Zoho Books: tax is not automatically pulled from product-data anymore - why?

Hi,

until a short time ago, you could set a default taxrate for each product/item. This taxrate automatically appeared each time the item was chosen in an invoice or quote. 
Why does this not work anymore? The field is still there at the product record, but it does not work anymore. If I pick anything from the tax-catalogue in there, it overwrites with "none" when I save.

Does anyone else see this behaviour? What do I need to do to fix this?

Kind regards

Lea