Flowcode Support Board

Yes — I can see it directly in the PropertyManager.fcsx source, no guessing needed. It's a real bug in the component itself, in how it handles bare/root-level properties (ones registered without a Component:: prefix, like UpdateRate).

Here's the actual mismatch, line by line:

In RegisterProperty (line 390-392), the handle starts as Component.GetRoot(). If the property name you register has no :: in it at all (a bare property), the loop that would normally call Component.FindChild never runs, so Handles[NumProps] ends up storing the root panel's handle.

In Save (line 145), the check is Handles[.idx] == this. But this in this macro means PropertyManager1's own handle, not the root panel's handle. Since a bare property's stored handle is the root handle, not PropertyManager1's own handle, this comparison is always false for bare properties. So instead of writing the literal string this::UpdateRate,5, it falls through to the else branch and writes Tree.GetName(Handles[.Idx]) — the actual name of the root panel (e.g. Main::UpdateRate,5).

Then in Load (line 290), it reads that component-name token back and checks .SubStr != "this". Since the token is the panel's real name (not literally "this"), this is true, so it calls Component.FindChild(.Handle, .SubStr) — trying to find a child of root literally named the same as the root panel itself. That fails, because the root isn't a child of itself. .Handle comes out of that call invalid/wrong.

That broken handle is what then gets passed into Component.Property.SetValue(.Handle, .PropName, .SubStr) — targeting the wrong (or no) component, so the bare property never actually updates, even though the value in the file is correct.

So the fix on Flowcode's end would be either: compare Handles[.idx] == Component.GetRoot() in Save instead of == this, or have Load specifically special-case when the resolved handle equals root. Either way, this is a real, source-confirmed bug specific to bare/root-level registered properties