Flag link causes crash when a view has entities where flag doesn't apply

Problem/Motivation

When using a view that has flagable entities (products in my case), but also displays entities that have the field that creates the relationship but doesn't have the flaggable product, I am seeing this crash:

TypeError: Argument 1 passed to Drupal\flag\Plugin\views\field\FlagViewsLinkField::renderLink() must implement interface Drupal\Core\Entity\EntityInterface, null given, called in MY_SITE\web\modules\contrib\flag\src\Plugin\views\field\FlagViewsLinkField.php on line 133 in Drupal\flag\Plugin\views\field\FlagViewsLinkField->renderLink() (line 172 of MY_SITE\web\modules\contrib\flag\src\Plugin\views\field\FlagViewsLinkField.php)

Steps to reproduce

1. add a products flag,
2. have a content view that displays content with a product relationship,
3. add a products flag link to the view,
4. display one piece of contentin the view without the product.