Documents app (sailfish-office) shows postscript files which it can not open

REPRODUCIBILITY (% or how often): always
BUILD ID = OS VERSION (Settings > About product): 4.2.0.21
HARDWARE (XA2, X10, X10 II, …): XA2
UI LANGUAGE: German
REGRESSION: (compared to previous public release: Yes, No, ?): No

DESCRIPTION:

Postscript files are shown in the file list but can not be opened.

PRECONDITIONS:

Postscript files in ~/Documents folder.

STEPS TO REPRODUCE:

  1. Put some ps file in ~/Documents
  2. open sailfish-office app
  3. tap on ps file to try to open

EXPECTED RESULT:

either do not show ps file or open it

ACTUAL RESULT:

shows ps file but does not open it

ADDITIONAL INFORMATION:

(Please ALWAYS attach relevant data such as logs, screenshots, etc…)