Description:
Attached DOCX file made in Word contains a simple table with horizontally merged cells and internal borders turned off.

When opened in Writer the right horizontal border of the table is missing.

Steps to Reproduce:
1.	Create a table in Word with horizontally merged cells in one row.
2.	Turn off the internal borders of the table.
3.	Save the file and reopen it in Writer.


Actual Results:
The right external border of the table is missing in the row with the merged cells.

Expected Results:
External border visible is all around the table.


Reproducible: Always


User Profile Reset: No



Additional Info:
LibreOffice details:
Version: 6.4.0.0.beta1 (x86)
Build ID: 4d7e5b0c40ed843384704eca3ce21981d4e98920
CPU threads: 4; OS: Windows 10.0 Build 17134; UI render: GL; VCL: win; 
Locale: hu-HU (hu_HU); UI-Language: hu-HU
Calc: CL

Also happens in:
Verzió: 3.6.0.4 (Build az.: 932b512)

Verzió: 4.1.0.3
Build az.: 719826cd009b9a1fa43e253db0616288c682826

Verzió: 5.0.0.5
Build az.: 1b1a90865e348b492231e1c451437d7a15bb262b
Területi beállítások: hu-HU (hu_HU)

Verzió: 5.4.0.3
Build az.: 92c2794a7c181ba4c1c5053618179937228ed1fb
CPU szálak: 4; OS: Windows 6.2; Felületmegjelenítés: alapértelmezett; 
Területi beállítások: hu-HU (hu_HU); Calc: CL

The borders are not visible in:
LibreOffice 3.5.0rc3 
Build ID: 7e68ba2-a744ebf-1f241b7-c506db1-7d53735