URL ended with "/undefined" in SERP

Hi,

I found that some of my company website pages URL is end with "/undefined" in SERP. for example, https://www.exampledomain.com/undefined.

The undefined URL is redirecting with a 301 to the right one so it’s not generating a 404.

What should I do to make the actual URL display in SERP instead of "/undefined"?

Thank you!