AV.io SDI screen tearing on diagonal lines

I am experiencing strange video artifacts/tearing on diagonal lines with my av.io SDI.
Other capturecards don’t produce this tearing effect. Here’s my signal chain:

Atem 4 M/E broadcast studio 4K (1080 50p signal) —> AV.io SDI —> Vmix

Here’s a sample picture of the problem:

This issue at first glance looks like banding caused by interlaced to progressive video conversion. Unfortunately this image size is small and only speculative at this time. I would recommend reaching out to us at info@epiphan.com with more details about the signal chain, screenshots of the specific settings used on the ATEM as well as any details on the signal chain, including any adapters, extenders, converters and what troubleshooting steps have been tried without success, so that we can better troubleshoot your issue