Happens to me very often.
I use Safari on MacOS Monterey (on Intel) and Sonoma (on M1) - it happens on both.
I can't find a way to ensure it happens, but when it does, refreshing doesn't fix it.
Happens on both normal results page and images.
Clicking on the page shows the results.
Disabling all extensions makes no difference.
On the images search, after clicking, even though I can see results, I may not be able to scroll down.