Positions appear vacant in the Position reporting structure display

Hello experts,

We're running STVN 2.0 (build v 5.1.11.1). We've encountered the following issue: when selecting the Position hierarchy structure under My Work Area, the holder's name is displayed only for the main position which manages (A-012) the org unit which we are responsible for (A-741).

For all reporting positions (B-002), they appear vacant since the holder names are not displayed.

I've been looking at the AppResources.XML file but could not identify the line which may be causing this problem. Have any of you encountered this issue?

Any assistance is greatly appreciated.

Thank you