Jagex bans in delayed waves. It’s as simple as that. Even if your account gets a ban in 10 seconds or 365 days later - it most likely was flagged first. The exception only applies to manual bans.
This strategy was first introduced several years ago to throw off users who sought out to bypass bot detection; it’s sort of meant to confuse the user and not provide a clear line to reasons why they got caught. Judging by some of these posts, that strategy seems to be working quite well.
I tell you this with strong conviction as I was once affiliated with the company.