Well it sounds like "corporate speak". People might say it, and it will be understood, but it sounds strained. I think 'relevant' needs two parts, A is relevant to B, like: "The description of the problem is still relevant to the current condition." Simpler: "This is still a problem" is a very common way of stating it.

This is OK to say. You can also say: This problem is still a concern. This problem is still important. This problem is still a current matter. Good luck!