I have Ciirus too. I ran into a big problem last week. I see you are/were having issues too.
One of my Plus listings was permanently disabled by Airbnb because Ciirus is not up to date on the security settings. They told me so themselves. It is the area where it asks you if you have a camera, or dangerous conditions.
Since you have so many properties, please be aware that Airbnb does not care if Ciirus is not up to date and will disable listings if that section is not checked. And if you are fully synced, you will not be able to check that required area.
I was told by my rep... not the tech team which I reached out to first... to change from fully synced to pricing and availability only to be able to click the security options. But it was too late for me.
Since Ciirus is not taking action to fix this, I am reaching out to let the other Ciirus clients know because we lost a lot of revenue as Airbnb cancelled all my reservations. And this should have never happened in the first place. Please feel free to reach out to me with questions. I hope this helps you!