Persistence through Sleep for Mounted LUKS Encrypted USB devices

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Greetings,

My laptop enters a sleep state when I close the lid (monitor).  That is
normal.  

However, if I mounted a LUKS-encrypted device connected via a USB port,
the session breaks when the machine wakes.  Is that still normal?  BASH
tells me that the mount point is engaged, whereas the device has been
relabelled (from /dev/sdc to /dev/sdd or something else).  The "lsblk"
command indicates that the device is not mounted anymore.  Of course,
that disrupts any process accessing the USB storage device when I close
the lid.

The troubling part is that the mount point stays busy as though it is
mounted.  Trying to umount is futile (umount: /mnt/usb: target is
busy.).  How do I break out of this?  I still ask, Is this the design,
or should I be reporting a bug?

Regards
Onyeibo

----------
uname -a:

 5.15.0-0.rc6.47.fc36.x86_64 #1 SMP Mon Oct 18 17:11:29 UTC 2021 x86_64
 x86_64 x86_64 GNU/Linux

Fedora Rawhide.
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