Thanks, got it.
Capture devices which are not supported natively in Resolume are accessed via directshow on windows.
Looks like it crashes in the deltacast directshow driver.
No real info to go on unfortunately, as we can't see into the driver
As it works fine in other apps it's likely that we're doing something odd when closing it, which the driver can't handle.
Could you send us some screenshots of the Deltacast clip's options?
What's the source you're trying to capture, is it maybe available as NDI?
Could you try how the capture card works with Resolume on a non LTSC Windows installation?
500ms latency is also a lot.
If the deltacast works fine in another app which can do NDI output (like OBS with NDI plugins), Resolume 6 and 7 can do NDI input, maybe that could be a quick workaround.