I keep getting blocked for security reasons 2-4 times a week and it's slowly driving me insane

Over the last 2-3 weeks, I've been blocked from reddit for "security reasons" and changing my password multiple times a week. Each time I pick something literally by massing my keyboard so it'd be impossible to guess, but it keeps happening anyway! I've literally resorted to changing the password of literally every other single account linked to my reddit account, but it's still happening and this is more or less my last resort outside of just accepting having to literally change my password practically every other day.

Clarifications:

  1. The only user activity I do not recognize is from an "unknown-user-agent" with a webhost of "Amazon.com". I've seem some other people mention this being linked to ads or something similar on the sub
  2. I have only linked postpone to my account to keep track of my post drafts more nicely
  3. I use the official reddit app
  4. I have another personal account that has been unaffected
  5. I do not use VPNs period

Please let me know if there's more information I can provide.