How do I debug uxplay only *sometimes* working? (Visible from iOS, not a firewall issue maybe)

[Aquaeyes]

I'm running debian bookworm 12.8, on Linux 6.11.10 - I don't have ufw or firewalld even installed, but all other issues I can find on the repo seem to point to uxplay being visible from the iOS device but not going through as a firewall issue - my sudo iptables -L -v output is

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

which seems to indicate that there definitely is no firewall installed?

 uxplay -d
UxPlay 1.71: An Open-Source AirPlay mirroring and audio-streaming server.
Audio format 1: AAC-ELD 44100/2
GStreamer audio pipeline 1: "appsrc name=audio_source ! queue ! avdec_aac ! audioconvert ! audioresample ! volume name=volume ! level ! autoaudiosink sync=true"
Audio format 2: ALAC 44100/16/2
GStreamer audio pipeline 2: "appsrc name=audio_source ! queue ! avdec_alac ! audioconvert ! audioresample ! volume name=volume ! level ! autoaudiosink sync=false"
GStreamer video pipeline 1:
"appsrc name=video_source ! queue ! h264parse ! decodebin ! videoconvert ! video/x-raw,colorimetry=sRGB,format=RGB  ! videoconvert ! videoscale ! autovideosink name=autovideosink_h264 sync=true"
Initialized GStreamer video renderer 1
using system MAC address 44:fa:66:08:b6:7f
Initialized server socket(s)
register_dnssd: advertised AirPlay service with "Features" code = 0x527FFEE6
GStreamer h264 bus message: autovideosink_h264-actual-sink-xvimage state-changed
GStreamer: automatically-selected videosink (renderer 1: h264) is "xvimagesink"
GStreamer h264 bus message: autovideosink_h264 state-changed
GStreamer h264 bus message: videoscale0 state-changed
GStreamer h264 bus message: videoconvert1 state-changed
GStreamer h264 bus message: capsfilter0 state-changed
GStreamer h264 bus message: videoconvert0 state-changed
GStreamer h264 bus message: typefind state-changed
GStreamer h264 bus message: decodebin0 state-changed
GStreamer h264 bus message: h264parse0 state-changed
GStreamer h264 bus message: queue2 state-changed
GStreamer h264 bus message: video_source state-changed
GStreamer h264 bus message: pipeline2 state-changed
GStreamer h264 bus message: videoscale0 state-changed
GStreamer h264 bus message: videoconvert1 state-changed
GStreamer h264 bus message: capsfilter0 state-changed
GStreamer h264 bus message: videoconvert0 state-changed
GStreamer h264 bus message: typefind state-changed
GStreamer h264 bus message: h264parse0 state-changed
GStreamer h264 bus message: src stream-status
GStreamer h264 bus message: queue2 state-changed
GStreamer h264 bus message: src stream-status
GStreamer h264 bus message: video_source state-changed
GStreamer h264 bus message: pipeline2 state-changed
GStreamer h264 bus message: pipeline2 new-clock
GStreamer h264 bus message: videoscale0 state-changed
GStreamer h264 bus message: videoconvert1 state-changed
GStreamer h264 bus message: capsfilter0 state-changed
GStreamer h264 bus message: videoconvert0 state-changed
GStreamer h264 bus message: h264parse0 state-changed
GStreamer h264 bus message: queue2 state-changed
GStreamer h264 bus message: video_source state-changed
GStreamer h264 bus message: src stream-status
GStreamer h264 bus message: src stream-status
GStreamer h264 bus message: h264parse1 state-changed
GStreamer h264 bus message: h264parse1 state-changed
GStreamer h264 bus message: avdec_h264-0 state-changed
GStreamer h264 bus message: avdec_h264-0 state-changed
GStreamer h264 bus message: avdec_h264-0 latency

I'm not quite sure how to reliably get this to work, or even narrow down the issue so that I could make a github issue. Any help would be appreciated! (Also, is there a way to sure-fire KNOW that there's not a firewall running?)

[Aquaeyes]

To add, it seems it consistently works after disabling and enabling network connections on the computer running UxPlay. How would I go about finding why this is the case?