I found the place where the old behavior was possibly broken:
https://issues.apache.org/jira/browse/TAP5-2308
Did anyone else encounter this problem as well?

On Fri, Jan 3, 2020 at 10:04 PM Ilya Obshadko <xf...@xfyre.com> wrote:

> Disclaimer: I'm doing a 'long overdue' upgrade from 5.4-beta6, so I might
> be missing something obvious.
>
> Symptoms:
>
>    - I'm using a checkbox with *TriggerFragment* mixin and *FormFragment*
>    component
>    - I'm getting a JavaScript error in Chrome console: RequireJS error:
>    require: Invalid configuration, fragment with id policyFragment_0 not
>    found
>    - Setting a breakpoint on clientId field value change in *FormFragment*
>    shows the following:
>       - initially clientId value is correct and it's indeed
>       *policyFragment_0* (top if the stack is *conduit_get_clientId*)
>       - then it's reset to *null* (top of the stack is
>       *conduit_set_clientId*)
>       - then it's set to *policyFragment* (without trailing *_0*),
>       apparently because *TriggerFragment* mixin is calling
>       *FormFragment.getClientId()* again; the field is already null at
>       this point, so it's just re-initialized with an incorrect value
>
> Apparently the culprit here is the *clientId* field re-initialization;
> any ideas what might be causing this? The setup itself seems to be fairly
> obvious.
>
> --
> Ilya Obshadko
>
>

-- 
Ilya Obshadko

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