[SOLVED] RTT not working with J-Link Ultra+ V5

We have a couple of J-Link Ultra+ V4 and V5. With V4 devices everything works fine when using RTT for terminal operations in RTT Viewer or similar tools.

When using exactly the same setup with V5 J-Link devices I can still establish the RTT connection as usual, but don't get any terminal output.
What could be the problem?

I have tried with a couple of different software and firmware versions, including the latest V8.28.

Solved. After updating the target implementation to the latest version, it also works with V5 devices.