RFQ disabled at checkout page when cart contains only products with zero price

Hello guys

First of all thank you very much for your awesome plugin!

My setup is:

Checkout option –> RFQ
Always Show Prices With RFQ Checkout –> Checked

Everything works fine, except one thing… I have some products with 0$ price. When a customer adds at cart ONLY products with 0$ price (so the order total is 0$), the RQF seems disabled at the checkout page. If a customer adds for example 2 products with 0$ price and at least one product with price bigger than zero, the RQF works fine at the checkout page. Can you please help me with this?

P.S. If the “Always Show Prices With RFQ Checkout” option is NOT checked, both scenarios work fine :/

Thanks a lot