[PVR] Recordings: PlotOutline vs Episodename

In PVR-recordings and LiveTV “PlotOutline” gave some more info about the running or recorded program.
PlotOutline is no longer working for Recordings.
Is that a known issue? I have to use “Episodename” instead.
Why is “PlotOutline” working in LiveTV? Shouldn’t both give back the same info?

Thx for clarification