My experience from dealing with a similar problem species is that it’s only the website CV (and maybe Android?) that gets updated with the new model monthly. I just checked the ID feed for that species and CV IDs were still coming from Seek and Next until December 2025 and the species was officially removed from the CV in February, 10 months earlier. At this point barely any new IDs of the species are coming in (although we’ll see what happens when active season hits again) and I’ve finally resolved the flag on it, over 8 years after flagging it.
For taxa where the popularly understood species concept matches onto an abundant and easily observable phenotype, it’s going to take multiple ID blitzes over the course of multiple months to resolve it, along with communicating very clearly to literally everyone who’s identified it in the past. A single naive identifier can easily get the ball rolling to restart the CV feedback cycle unless most of the relevant identifier community knows to correct their IDs.