Posts under category Facebook Webhooks

We have an App with multiple Ad-Accounts.
We use the Webhook 'leadgen'. The Callback-Url is verified and the hook works for most Pages.
We tried to add a new page recently, but no leads are sent. We have created a new access token with the following permissions:
pages_show_list, ads_read, ads_management, leads_retrieval, pages_read_engagement, pages_manage_metadata, pages_manage_ads
In the Access Token Debugger https://developers.facebook.com/tools/debug/accesstoken the page shows up correctly in the permissons table.
On the Lead Ads-Testtool however https://developers.facebook.com/tools/lead-ads-testing we get the message 'no Webhook-Subscripton for Leads Ads'.
In the Graph API Explorer the page also doesn't show up under Page-Tokens, even though we can and did chose it when creating the token.
The person creating the Token is an Admin on the App. The webhook works fine for all other pages.
What's going on?

I'm getting webhook for threads - but there are some issues.
How do I identify the user that the webhook is related to? I do get the post ID in the webhook - but how to find out to whom (user ID) it is related to? (i can all the API to get the threads info - but whcih token should I use - I am managing multiple users)
What are the suubscription_id":"999999999999" and "has_uid_field":false means?

When i send message to this Page, i didnt get any webhooks from Messenger. This happens only for some users and this happened this morning (yesterday it was working just fine).
My facebook account: https://www.facebook.com/adambudimanaichat/ Page: https://www.facebook.com/profile.php?id=100095114695515

Hi,
We are receiving reports from our customers that some comments on posts are missing. We have investigated and found that these comments all have one thing in common: we did not receive a webhook for them. We have called the API to check and still see these comments being returned in the response. This issue is seriously affecting our customer service process. Please investigate this issue for us.
Missing Comment Id: 788187760189149_1236315917778588 Page: 363549471144008 PostId: 788187760189149