Element Select inside of a custom form errors when a file is dragged to it

Description

I have an ElementSelect field that allows people to upload images inside of SEOmatic, generated via

            {{ forms.elementSelect({
                id: "seoImageIds",
                name: "seoImageIds",
                viewMode: "large",
                elements: seoImageElements,
                elementType: elementType,
                criteria: {
                    kind: ["image"],
                },
                jsClass: 'Craft.AssetSelectInput',
                selectionLabel: "Select SEO Image"|t("seomatic"),
                sources: [],
                limit: 1,
                warning: false,
                errors: metaBundleSettings.getErrors("seoImageIds"),
            }) }}

This all works fine, unless the user drags an image to that input element, in which case it results in the following error: The field provided is not an Asset field

This appears to come from AssetsController.php around line 87:

            if (empty($folderId)) {
                $field = Craft::$app->getFields()->getFieldById((int)$fieldId);

                if (!($field instanceof AssetsField)) {
                    throw new BadRequestHttpException('The field provided is not an Assets field');
                }

                $element = $elementId ? Craft::$app->getElements()->getElementById((int)$elementId) : null;
                $folderId = $field->resolveDynamicPathToFolderId($element);
            }

Since I'm not passing in an $folderId for the upload destination, I'm assuming this is what triggers it. I guess my question is... is this a bug? The rest of the UX works fine, people can click on the button to choose an image or upload an image without an issue.

Should it be ensuring that the source field type is an AssetsField here? Seems like dragging won't work for custom forms in this case?

https://github.com/nystudio107/craft-seomatic/issues/151