Cache 404 error

Hi everyone
I deployed a website using S3 and cloudfront some weeks ago and I just realized something. If I look at their cache on google, all my pages are redirected to 404 while everything seems to work normally.
Is this common?
Aside from using lambda edge to make sure the last slash was removed, I did not do much special.

An idea where the problem may come from?

Thats really strange. In this chapter ( we specify that we want to return 200 for all the requested pages. Do you have that specified?