Disconnected PXI locking up computer

I have an issue when an otherwise working PXI with PXI-5922 installed connected to a PCIe slot in my host computer by an optical cable. Everything works great if I boot up the computer with the chassis powered, but if the chassis loses power or for some reason the data link is physically disconnected, if any software tries to communicate with the chassis, the computer locks up completely. Mouse movements or keyboard presses do not register and I have to do a hard-reset.
Is this a known issue?
It can be reproduced in NI-MAX by verifying a successful connection to the device and then disconnecting the device and refreshing the connected devices in NI-MAX.

Hello Allman,
The behavior is totally expected. That is NOT a correct use of the PXI. You did not mention what PXI you are using or what MXI connection you are using, but you can find in the manual the instructions to power up the system and you need to power on the chassis first, then you power on the host. If you are going to power down the system, power down the host first, finally the chassis.
Because of this, BIOSes and operating systems make the assumption that all PCI devices in the entire hierarchy will be available as soon as code execution begins at power-up time. This assumption means that all of the expansion chassis must be turned on before the host PC for the BIOS and OS to correctly configure a MXI-Express system.
Regards
Frank R.

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