How long is normal to have to train the spam filter?

I requested and received a subreddit named for a popular TV show over a month ago. The sub had been banned for spam, but I refilled it with threads and brought it back to life.

Since the show is airing now, it’s becoming a popular place to discuss the show. The problem is that I have to approve every post and comment. The sub is set to public. I have turned the safety filters all the way down, but the spam filter still removes everything not submitted by an approved submitter.

How long should I expect this to continue? At this point, I’m manually approving a few dozen posts and comments a day! I’ve stood up brand new subs before and never had to contend with this. Is it taking an extra long time to train the filter because the sub was previously banned for spam?