Texting myself goes to my work phone that’s not associated in any way

My personal phone and work phone are both apple and ATT. Other than that they are not associated in any other way. They have separate Apple IDs, I do not have iMessage forwarding on, my personal phone isn’t even a contact in my work phone.

When I text myself from my personal phone it goes to my work phone as an imessage. The message from my work phone then is sent to my iPad. I validated this pattern by blocking my personal number from my work phone and it did not show up on my iPad. Checked every setting out there on all 3 devices they are not connected or forwarding messages. The apple ids are separate and also not connected. This happens on WiFi or cellular.

what am I missing here?