xlsclients doesn't list all clients

[Robert Latest <boblatest@gmail.com>]

Hello,

how is it possible that xlsclients doesn't "see" all X clients? Here's
my output from xlsclients:

me@dotcom:~$ xlsclients -a
dotcom  xfce4-terminal
dotcom  xfce4-notifyd
dotcom  firefox-esr
dotcom  /usr/lib/firefox-esr/plugin-container
dotcom  claws-mail
me@dotcom:~$

What's missing here is the instance of Digikam on the same desktop.
Here's the output feom xwininfo on that window:

me@dotcom:~$ xwininfo

xwininfo: Please select the window about which you
          would like information by clicking the
          mouse in that window.

xwininfo: Window id: 0xa0000d "digiKam"

  Absolute upper-left X:  552
  Absolute upper-left Y:  220
  Relative upper-left X:  552
  Relative upper-left Y:  220
  Width: 1012
  Height: 533
  Depth: 24
  Visual: 0x74
  Visual Class: TrueColor
  Border width: 1
  Class: InputOutput
  Colormap: 0xa0000c (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +552+220  --286+220  --286-269  +552-269
  -geometry 1012x533+552+220

me@dotcom:~$

I'm running dwm. Same behavior on versions 5.7 and 6.1. But that
shouldn't matter anyway, a window's a window, right?

robert