Not receiving email notifications for following SDK topic in Lightroom Classic forum

I'm following the SDK topic in the Lightroom Classic forum:

But I haven't received email notifications for 3 of the 4 most recent SDK posts:

https://community.adobe.com/t5/lightroom-classic-discussions/sdk-update-to-lightroom-classic-sdk-is-now-available/td-p/12743173

https://community.adobe.com/t5/lightroom-classic-discussions/publish-service-callback-imposesortorderonpublishedcollection-implementation-needs-fixed/td-p/12759142

https://community.adobe.com/t5/lightroom-classic-discussions/dialog-box-minimized-in-windows/td-p/12755566 

I did receive a notification for 1 of the 4:

https://community.adobe.com/t5/lightroom-classic-discussions/sdk-rearranging-images-when-sort-set-to-quot-custom-order-quot-causes-errors/td-p/12758880 

and I've received notifications for at least some non-SDK posts in that forum.

My notification settings: