After update (3.6.2) subtotal is displayed wrong in corfirmation email

Hi there,
I had updated to 3.6.1. and had not experienced that error ever before. But after updating to 3.6.2. in some cases (not all) the subtotal displayed on the order confirmation email, is not displayed correctly. That means sometimes we have a subtotal like 10,01 Euros oder 12,99 Euros, althought we only have rounded prices such as 10,00 Euros or 13,50 Euro…

There has been NO update in themes, plug-ins etc so far except WooCommerce updated to 3.6.2.
Its not dramatic, since the total price is correct at the end (which doesnt make it less weird), but somehow I’d like to know where it comes from.

I was not able to reproduce the error during checkout (online) – subtotal and total price look fine. It only shows that issue in confirmation email (received by customer).

Has there been a change in calculation, taxes, etc somehow?
Here is a screenshot of the issue: https://imgur.com/a/LhTBXeC

Maybe someone has an idea…
thanks
Pedro