Notion page cannot be imported if it contains an image and there is an umlaut in the page title

Notion page cannot be imported if it contains an image and there is an umlaut in the page title

To reproduce, I have attached two ZIP files, which are two exports of Notion pages each containing an image, one with an umlaut in the page title ("Lörem ipsum") and one without an umlaut in the page title ("Lorem ipsum").
The file with the page that has the umlaut in the title can not be imported ("Loading…").
Importing the other file (no umlaut in the page title) works as expected.