How to avoid "Account in Review" When Doing Nothing Wrong? (Whatsapp only; not all Meta)

This is the second time I've gotten a temp ban for "suspicious activity." How do I avoid that because it's really annoying? It's Whatsapp only; I can still log into FB and Insta.

Surprisingly, I couldn't find any threads on avoiding this on here, just reassurances that it's temporary.

I have a unique, random password, and I sure don't see anything that suggests I've been hacked.

- I did login from a new location yesterday, but I was on my regular phone. - It's an old account I haven't used much until recently, and I still only use it for one chat right now. - I initially got Whatsapp to communicate with my dad when he's away in Saudi, but we haven't done that in years.

That's all I can think of that's remotely unusual about my usage, so I'm at a loss for what flag I trip.