I’m not one of the guru’s but i’d say you stop all actions all together for a little then come back to the account after a couple days. I feel just because you switched proxies it might not matter the next day. You might have to switch proxies and then wait a little then start back from warming up the account.
Were those 3 accounts made in any different manor then the other accounts that haven’t had any issues?
What do you feel the issue is? Do you think it’s a setting issue or an IG issue? Have you tried copying settings from 1 account that’s working fine into that account? By actually using the Jarvee software to copy your settings and not by your eye?
I’ve been referencing this article a lot to see what the difference are between the accounts. Hope it helps.