Description:
I asked this here: https://ask.libreoffice.org/en/question/249817/writer-how-to-avoid-this-the-text-of-the-left-cell-is-supposed-to-appear-vertically-in-the-middle-but-if-theres-a-page-break-it-appears-this-way/
For the left picture if I click the text, it goes right to its place but with all of these tables, I can't be checking everything all the time and it's an important work, so I want the PDF to look as it's supposed to. 

This doesn't happen with the right picture though

Here's a couple of screenshots (the black rectangle is a page break)

Here's a sample: [sample.odt](https://ask.libreoffice.org/upfiles/15919560978461876.odt)

    OS: GNU/Linux Manjaro 20.0.3
    DE: KDE 5.70.0 / Plasma 5.18.5
    LibreOffice 6.4.4.2 40(Build:2)

[image description](https://ask.libreoffice.org/upfiles/15919117916007376.png)

Someone told me that my tables have a "complex" structure: cells in the first column are merged as their contents are common to several rows in the other columns. All cells have content vertically centered.

In Table>Properties, we see that the tables can split across several pages (necessary because the tables span several pages) and rows can also split.

This is usually fine, but here the merged cells in the first column introduce a disturbance. When a page break cause a row split, Writer gets confused about how spread first column text. It seems to compute correctly the amount of text is the split parts of the cell but is lost when it comes to position the text: top or centered in the part before the break and seemingly full centering space in the part after the break as if the cell has not been split with the result of clipping overflow text.

Steps to Reproduce:
1. Create big tables with several rows
2. For rows that appear in several pages, make them go vertical and horizontally aligned

Actual Results:
Text isn't vertically aligned: sometimes it goes up, sometimes down and even overlapping other cells.

Expected Results:
Text isn't misaligned.


Reproducible: Always


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
Version: 6.4.4.2
Compilation ID: 6.4.4-1
Subprocs. CPU: 4; SO: Linux 5.6; Repres. IU: default; VCL: kf5; 
Regional Configuration: es-ES (es_ES.UTF-8); IU language: es-ES
Calc: threaded