Magento 2.4.8-p2 MSI inventory problem

We are trying to manage stock in Magento 2.4.8-p2 but it seems that something is wrong probably in our local. Of course all MSI modules are enabled.
Here is the scenario:

  1. 2 Stocks are created. Stock ID 1 which is the magento default stock and stock id 2 (our new stock)
  2. Our store have only Main Website in Websites
  3. For now stock ID 1 have Main Website in Sales Channels and because it is the default magento stock no sources are assigned
  4. 4 sources are created. Source default(from magento) and 1, 2, 3
  5. Now we have a catalog of around 16K skus. We are testing to manage stock only in 100 skus for now.
  6. I have set all 15.9K skus to default magento source with inventory 99999
  7. I have set the 100 skus we need to manage to default magento source with inventory 10
  8. The 15.9K have setting manage stock to No and the other 100 have manage settings to yes. Also in admin>configuration Decrease Stock when order is YES, Display Out of stock is YES, Only -X left is to -10(we don’t use this), Syncronize with Catalog is to NO, Backorders is Allow Qty Below 0, Out of stock Threshold is to 0

Now the problem. After setting the 100 skus to manage stock YES, magento in front end removes add to cart and products seems that has no stock, so you can’t order.
Alhtough in admin all these products are In stock in inventory and of course have quantity set to 10
When I disable the Manage Stock (set to No) then everything is fine.

I cannot identify what is going on and why magento handles these products like this.
Any help please to identify the problem?