Thanks for reaching out to us here in the Community.
To clarify, have you tried adjusting the dates of the report?
If you have tried adjusting the dates on the report and it's still showing, then I recommend clearing the cache from your browser. Web browsers collect cache (cookies) to save time when loading repetitive data and images. These files often become outdated and corrupted over time, causing issues like the one with your report not showing data for other months. I've included the links for all supported browsers below that contain the steps to clear the cache.