Cloudflare randomly returns an empty response for my site

https://www.placebiermans.com/

When I disable cloudflare proxy, the response actually contains some HTML, but with the proxy on, the response is empty about half of the time.

Headers are all sent correctly, but there is no HTML at all.

The response code is (still) 200 all of the time.

It could be related to, kindly, see and follow this topic for any new information → Cloudflare frequently returning incomplete files to browsers