Gmail personalization doesn't work - and does not fail

So, I'm trying to teach swiftkey some words in bulk so I don't have to type them all. I send myself an email with the words which I want to be added and then I click the personalise with Gmail. All goes seemingly well, I get 'Last personaliszed: just now", then I try swiping the new words and they are not getting completed. If I try to type them I can see they are not there bc I get the word grayed out ready to be added. Obviously new words were not added.

I don't have the problem with 'personalization failed' most ppl have.

Any suggestions? IMAP is ON, Send mail is on IMAP, tried with another gmail account, same thing.

regards.