What would cause the following error: ‘Eject "Apple SSD – Data" before disconnecting or turning it off’

I just saw the message below on my 2015 MacBook Pro running macOS 12.2.1. It seems weird for macOS to be complaining about ejecting an internal SSD that I could never actually eject.

What could cause this? Is there anything that I need to do to fix it or diagnose it?

I have no external drives hardwired to this laptop, if it matters.

I saw this after unlocking my Mac. Right before that, I woke it up by typing on my external keyboard. This laptop is usually docked and connected to KVM by an IOGEAR GCS62DP KVM switch.

Here’s output from diskutil list:

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI ⁨EFI⁩                     209.7 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk1⁩         1.0 TB     disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +1.0 TB     disk1
                                 Physical Store disk0s2
   1:                APFS Volume ⁨APPLE SSD - Data⁩        396.2 GB   disk1s1
   2:                APFS Volume ⁨Preboot⁩                 718.9 MB   disk1s2
   3:                APFS Volume ⁨Recovery⁩                1.6 GB     disk1s3
   4:                APFS Volume ⁨VM⁩                      7.5 GB     disk1s4
   5:                APFS Volume ⁨APPLE SSD⁩               15.8 GB    disk1s5
   6:              APFS Snapshot ⁨com.apple.os.update-...⁩ 15.8 GB    disk1s5s1

/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +2.0 TB     disk2
   1:                        EFI ⁨EFI⁩                     209.7 MB   disk2s1
   2:                 Apple_APFS ⁨Container disk3⁩         2.0 TB     disk2s2

/dev/disk3 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +2.0 TB     disk3
                                 Physical Store disk2s2
   1:                APFS Volume ⁨Time Machine Backups⁩    543.1 GB   disk3s1