Multi select not showing the selected options on index and details page

[ptravassos]

• Laravel Version: 10.48.10
• Nova Version: 4.33.3
• PHP Version: 8.2
• Database Driver & Version: mysql

Description:

Working on previous Nova version (4.33.2).
On the multiselect, if you select the "Small" (Key "S") and "Small Medium" (Key "SM") options, and save it. It will show on index and Details the "Small", "Small Medium" and "Medium". Like a combination of all caracter of the key values.

The same happened with numeric keys. Select the key 31 and 39 and it showed the values of keys, 1, 3, 9, 31, 39.

Detailed steps to reproduce the issue on a fresh Nova installation:

Database Column "plans" Varchar 255
**Model cast: ** 'plans'=>'array'
Nova Model with field:

MultiSelect::make('Plans')->options([
                'S' => 'Small',
                'SL' => 'Small Large',
                'SM' => 'Small Medium',
                'M' => 'Medium',
                'L' => 'Large',
            ]),

[crynobone]

Regression from #6350

[github-actions]

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