Flattening Portal Bridge feature breaks Thunderbolt MXI; need driver to suppress FPB.
Beginning with Windows 10 1909, certain host system ThunderBolt Controllers, such as Titan Ridge systems, cannot communicate reliably with Thunderbolt MXI controllers, like the PXIe-8301. This can result in a variety of symptoms, including detection issues and blue-screen crashes.
There is currently no known workaround for this issue.
PXI Platform Services 20.5
PXI Platform Services 20.7
Apr 14, 2021