Description:
Attempting to Open/Save a file via a FileBrowser dialog with libreoffice-kde (Version: 1:5.4.5-0ubuntu0.17.10.1) installed forces Libreoffice (Version: 1:5.4.5-0ubuntu0.17.10.1) to restart, prompting a document recovery.
Does not happen when libreoffice-kde is removed.



Steps to Reproduce:
1. Open Libre Office (any module)
2. Try Opening / Saving a file (Save As)


Actual Results:  
Libre Office's document reovery is opened and it displays a text saying Libreoffice encountered an internal error [..], giving you the option to recover your opened documents, which, if chosen, works.

Expected Results:
A FileBrowser Dialog pops up and you can choose a file to open or a directory and name to save your document at.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Opening a file via recently used or via command line / the systems File Browser (Dolphin) works fine.
Saving a file with an already set path gives no problems.

About:
Version: 5.4.5.1
Build-ID: 1:5.4.5-0ubuntu0.17.10.1
CPU-Threads: 4; BS: unknown; UI-Render: Standard; VCL: kde4; 
Gebietsschema: de-DE (de_DE.UTF-8); Calc: group


User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0.4 Waterfox/56.0.4