Hi, I am Dave, I will help you with this.
That is not related to the recent CrowdStrike worldwide outage, that indicates some bot online is trying to hack your account, there is no way to stop that, but eventually they will move on and stop trying to hack your account.
You have performed all the correct steps, provided you have a long and strong password on your account, and you have enabled two step verification, then your account will be safe from that hacking attempt.