Nice finding ! 
If others people confirm that it solved this issue they had (I don’t personally have the issue mentioned, but probably because I use a fedora template instead of a debian one), it should be integrated in the guide.
For fedora template, wireplumber is in version 5.5 and different default values, value reported is 512 or 256
small extract from my system:
api.alsa.headroom = "512"
api.alsa.period-num = "64"
api.alsa.period-size = "512"