Force logout on all devices

I think someone has been accessing my account. My devices have been scanned, password changed, and yet sometimes my account sees activity when I'm not actually online. Thing I noticed is, if I change my password or deactivate while logged in on two devices, the other device can still do things (it's limited with a deactivation but DMs can be sent which is a huge problem imo. Upon reactivating, the second device regains full control). I started monitoring my activity while logged off when my profile picture was randomly changed to a random woman, and it was evident someone may have accessed my account today. Having it force a logout on all devices when changing the password would solve this.