This may or may not be common knowledge, but it's bugged me for a while.
When dynamically creating objects with struct scalar graphics they would not appear until the patch was closed then reopened.
Well, comma loadbang fixed it! [obj 0 0 someobject arg arg, loadbang(

When you dynamically create an abstraction, the [loadbang] objects inside it do not get fired. That's why your scalar doesn't show without adding the explicit "loadbang" message to your patch.

Works well if the objects that are loading are the only ones to exist in the patch and [loadbang( message is only required once, after all the objects are loaded
Not quite the panacea I thought, because each object that is instantiated on the go, resets (loadbangs) the existing instances.
So, to fix that problem, adding this to abstraction this seems to work

load-init-bang.pd

@Balwyn You can usually wait until you have dynamically instantiated all the abstractions you want, and then send a single "loadbang" message to the parent canvas.

Of course, if you are doing live dynamic patching (or incremental) then all bets are off.