Cannot save a view where a filter value option contains a period

(I did not find this issue reported yet when searching. I apologize if this is a double report.)

I have created a module that defines a custom content entity type. The module code only defines a Title field and hidden fields.

Via the Drupal interface, I added a field named "Category" to this entity type. The Category field is a text list field that only accepts 1 choice ("select" widget).

In /admin/structure/views/, I attempt to create a new Page view to only retrieve instances of this entity that have a certain Category value.

Because one of the Category choices selected for this view contains a period ".", Drupal crashes and displays the following in an otherwise blank page:

The website encountered an unexpected error. Please try again later.

Drupal\Core\Config\ConfigValueException: Dr. BPP key contains a dot which is not supported. in Drupal\Core\Config\ConfigBase->validateKeys() (line 211 of core\lib\Drupal\Core\Config\ConfigBase.php).
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 214)
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 214)
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 214)
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 214)
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 214)
Drupal\Core\Config\ConfigBase->validateKeys(Array) (Line: 161)
Drupal\Core\Config\ConfigBase->setData(Array) (Line: 107)
Drupal\Core\Config\Config->setData(Array) (Line: 279)
Drupal\Core\Config\Entity\ConfigEntityStorage->doSave('protein', Object) (Line: 392)
Drupal\Core\Entity\EntityStorageBase->save(Object) (Line: 259)
Drupal\Core\Config\Entity\ConfigEntityStorage->save(Object) (Line: 358)
Drupal\Core\Entity\Entity->save() (Line: 637)
Drupal\Core\Config\Entity\ConfigEntityBase->save() (Line: 986)
Drupal\views_ui\ViewUI->save() (Line: 312)
Drupal\views_ui\ViewEditForm->save(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 583)
Drupal\Core\Form\FormBuilder->processForm('view_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48)
Drupal\Core\Entity\EntityFormBuilder->getForm(Object, 'edit', Array) (Line: 226)
Drupal\views_ui\Controller\ViewsUIController->edit(Object, NULL)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 139)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 62)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 98)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 77)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 628)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Problem

We build an array of the selected items when using the InOperator where both the array keys and values are set to the selected item name. If the array key contains a period, this will cause an error when exporting this to config since sequences don't support periods in their keys

Proposed solution

Don't use an array with both keys and values set to the selected items, use a numeric array that only has the values set to the selected items