[Bug]: When saving range, "foreach() argument must be of type array|object, string given" exception thrown

[brianakidd]

What happened?

When saving, this exception was through in the hydrate Livewire function. The payload:

{
    "_token": "Tolh9pC4Wnw9mQRQqYwCIUFblXkEADlWAT54m8FA",
    "components": [
        {
            "snapshot": "{\"data\":{\"data\":[{\"id\":1,\"start\":\"2023-08-17\",\"end\":\"2023-08-18\",\"leave_time\":null,\"color\":null,\"notes\":null,\"team_id\":1,\"created_at\":\"2023-08-11T12:36:57.000000Z\",\"updated_at\":\"2023-08-11T19:57:53.000000Z\",\"dates\":[[\"2023-08-17\",\"2023-08-18\"],{\"s\":\"arr\"}]},{\"s\":\"arr\"}],\"previousUrl\":\"http:\\/\\/arrow.test\\/app\\/armstrong\\/assignments\",\"mountedActions\":[[],{\"s\":\"arr\"}],\"mountedActionsArguments\":[[],{\"s\":\"arr\"}],\"mountedActionsData\":[[],{\"s\":\"arr\"}],\"componentFileAttachments\":[[],{\"s\":\"arr\"}],\"mountedFormComponentActions\":[[],{\"s\":\"arr\"}],\"mountedFormComponentActionsArguments\":[[],{\"s\":\"arr\"}],\"mountedFormComponentActionsData\":[[],{\"s\":\"arr\"}],\"mountedFormComponentActionsComponents\":[[],{\"s\":\"arr\"}],\"activeRelationManager\":null,\"record\":[null,{\"class\":\"App\\\\Models\\\\Assignment\",\"key\":1,\"s\":\"mdl\"}]},\"memo\":{\"id\":\"B9flOQkhwoBlhEDgy1z3\",\"name\":\"app.filament.resources.assignment-resource.pages.edit-assignment\",\"path\":\"app\\/armstrong\\/assignments\\/1\\/edit\",\"method\":\"GET\",\"children\":[],\"lazyLoaded\":true,\"errors\":[],\"locale\":\"en\"},\"checksum\":\"81dc22fc8b5cc1c5aad920a817bbc88782f569c00a1cacc3874c62906623ff30\"}",
            "updates": {
                "data.dates": "2023-08-22"
            },
            "calls": [
                {
                    "path": "",
                    "method": "save",
                    "params": []
                }
            ]
        }
    ]
}

The dates property seems to be wrapped in an inner array:

"dates\":[[\"2023-08-17\",\"2023-08-18\"],{\"s\":\"arr\"}]},{\"s\":\"arr\"}]

How to reproduce the bug

Add component to form:

public static function form(Form $form): Form
{
  return $form
    ->schema([
      Flatpickr::make('dates')
        ->range()
        ->altInput()
        ->altFormat('D n/j/y')

Edit record by setting new value and saving.

Package Version

3.0.1

PHP Version

8.2

Laravel Version

10

Which operating systems does with happen with?

macOS, Linux

Notes

No response

[Reached]

EDIT I just realised that brianakidd already added the necessary info, sorry about that :)

To add a bit more context, I experienced that this only occurs for me upon saving an existing record (when editing). So creating the record seems to go fine, but when updating it seems to break.

I am using a json column if that matters.