It sounds like you’ve pinpointed the issue pretty well. If it’s a broader problem with Facebook affecting multiple websites, reaching out to the Facebook Developer Community is definitely a good move. They might have insights on whether this is a temporary issue or if there’s a workaround for mobile devices.
In the meantime, considering the first option of discontinuing the integration is worth thinking about, especially if data protection is a priority for you. If this feature isn’t critical to your site’s functionality, removing it could simplify things for now.
Hopefully, the Facebook community can shed some light on this!