Setting searchable select field to null not working

Forms\Components\Select::make('sender_id')
    ->label(__('Sender ID'))
    ->options(BrevoSenders::pluck('name', 'id'))
    ->searchable()
    ->reactive()
    ->afterStateUpdated(function (\Closure $set) {
        $set("email.welcome.template_id", null);
    }),
Forms\Components\Select::make("email.welcome.template_id")
      ->label('Template ID')
      ->options(fn (\Closure $get) => !empty($get('sender_id')) ? BrevoTemplates::where('sender', $get('sender_id'))->pluck('name', 'id') : [])
      ->searchable()
      ->columnSpan('full'),