You have a source I do not recognise - noiseless
And a sink I did not expect to see - alsa_output.pci-0000_0a_00.3.analog-stereo.echo-cancel
But the two sinks I expected to see for pulseffects-legacy are absent - PulseEffects_apps and PulseEffects_mic
I suspect you have added module-echo-cancel to PulseAudio with the option source_name=noiseless but without the sink_name option
The loopback and/or ring buffer for module-echo-cancel could be the cause of your latency problem
The module may also be conflicting with audio processing within some packages
Disable audio post processing in certain applications - ArchWiki