Shipment costs not always processed in Mollie

[jdereus87]

Reqs:
Magento 2.3.3.
GLS 1.3.0
Mollie 1.8.0

Problem:
Example: When submitting an order with a total of 34,95, the customer only seems to need to pay 29.00 in the mollie ideal and CC. The shipping costs are 5.95.
I am trying to isolate if the problem is GLS, Mollie, Magento, or a combination of these.

It only seems to apply to dutch shipments only, close to the free shipment config (35), such 29-30-31 etc.
While the price in the checkout order total seems correct (shipping is calculated and added tot the total), that when the order is finally submitted GLS removes the shipping costs because it calculated the VAT twice?

Question
Is it possible that following the checkout flow that this is a GLS module bug?

[tig-jeffreybranderhorst]

Hi @jdereus87,

We have not heard of this issue before, but does not mean that it is not possible that there is a conflict with certain settings. Could you e-mail us at support@tig.nl for further support on this issue.

Have a great day,
Jeffrey