What does it mean for a kata to be out of beta?

It means that it has passed a review and commenting period and has been released.

Why did it show up as a potential kata for training with the existing issues?

If you feel there are issues, please provide details as to what they are, and of course which language you are experiencing them in. However, also keep in mind that with most of the katas, they are not in beta, and have been completed hundreds or thousands of times. It is often helpful to look at the details section which tends to show what the expected output is for a given input.

What you have reported here does not seem to accurately describe any issues with this kata from what I can tell.

How can I ensure that any given kata to train on will be void of issues in the future.

In my opinion and experience, generially eading the instructions is a good start. Taking some time to become familiar with the testing framework and writing some tests may also be helpful.

Best of luck to you!

This kata has been out of beta for almost 10 years. If you're going to open an issue, maybe have a look at the Description first.

This is Java, Javascript is a different language.

Read this: https://stackoverflow.com/questions/4006302/why-is-java-string-type-written-in-capital-letter-while-int-is-not