I have no idea how it worked. The livestreamers probably can't say due to chances of a repeat.
Feedback for View Chat Bubble toggle option is throughout the official Twitter comment feedback.
The incident stream date:
Tbh, it's a bit off topic, but the mistake here was that SEGA didn't give streamer accounts special UI options that would've been on a level lower than a GM or CM account. (In that it's unavailable to the standard user.)
So on a technicality, easily preventative mistakes which are missed can lead to censoring an NPC's name or other highly debated features.
(In the case of Diggah, he got an upgrade in his construction pun.)
Wizard 101 has Pre-Set chat options for minors and prevents them from seeing or using the Premium Service chat.
While that sort of feature would ruin things for current F2Pers in NGS and base PSO2, it would absolutely stop the bot spam with the 24 hour cooldown for the first purchase delay.
I can't say that any adult livestreamer would appreciate such a Parental Controls default: ON sort of feature either.
But it is an advanced moderation method for a Mature (17+) rated game which contains minimal 16 years of age in the PEGI system.