Regarding your Google Ads account's integration with HubSpot, my apologies as our team cannot further comment as integration with third parties is already outside of our scope. Also, since this appears to be more product related, you may open your concern to the Advertiser's Community Forum as the product owners will be able to provide better assistance on this matter.
However, in the event that you are also using the AdWords API, I would recommend that you make the necessary changes, as mentioned in this blog, to avoid issues.
Regards,