cinnamon-session-quit : Missing "Sleep" button when sleep inhibited

[pilatomic]

On Mint 21.3 64 bit with cinnamon-session 6.0.1

Issue

With any program inhibiting sleep running (like Rhythmbox playing a track), the "Sleep" button is now missing from the dialog.

This makes it hard to put a PC to sleep with an unknown program inhibiting sleep.

Steps to reproduce

Play a song with Rhythmbox, click on "Shutdown" in Cinnamon menu.

Expected behaviour

Mint 21.2 displayed a popup listing the apps preventing the PC from going to sleep, and offered options.

Other information

[SporranTactic]

#147 - Same issue here. Copy/paste from a comment I left:

When music is playing in Rhythmbox:

When music is paused:

This appears to be the culprit:

UID: 1000
PID: 1929
COMM: cinnamon-sessio
WHAT: shutdown:sleep
WHY: user session inhibited
MODE: block