No Exit-node listed on qnap

[jo-chemla]

Hi there,
I'm trying to get my QNAP NAS to use a machine of my tailscale net as an exit-node.
I'm running 1.72.0 on multiple systems - a windows 11 laptop, android 14 and QNAP NAS, and I've setup all three as exit nodes, allowing them in the route settings of the Machines dashboard - see first screen' blue pills.

The issue is that the QNAP tailscale web UI select does not list any exit-node - only the None + Run as exit node options, see second screen. The windows and android tailscale UIs, on the other hand, do list one another as exit node - see also screen, the tailscale windows UI lists the android exit-node.
I've tried toggling on and off exit-node for qnap, but never managed to see the other machines listed. Is this standard behavior or a bug? Thanks for the feedback!

Screen 1, Machines dashboard

Screen 2, exit-nodes listed on qnap and windows