hello Brett, tcpdf library is called upon a specific order status by core VM and OPC cannot do anything about this...
please follow this guide to disable VM's TCPDF library:
viewtopic.php?f=5&t=933&p=3185&hilit=+tcpdf&sid=21f3b72969d2c2972b30eb72600e29c0#p3185or we can have a look on this, but because we are sure, the same problem can be replicated with an usage of the same payment methods which would lead to the same order status, the issue would also occur on your core VM checkout as well.
if you are on VM3.0.6, pls note that it requires to install tcpdf library separately and just yesterday there were a few fixes in this matter.
best regards, stan