Description:
Direct formatting (here: font size) is lost (reset to default font size) after selecting/overwriting text (part of the paragraph) + undoing the overwriting (Ctrg + "z").

Steps to Reproduce:
1.Type "abc def ghi" + Enter
2. Select everything using Ctrl + "a"
3. Change font size from default "12 pt" to "11 pt" (= direct formatting)
4. Select "def" using double click
5. Change font from "Carlito" (which is my default) to "DejaVu Sans Mono"
   >>> Note: font size of "def" is now "11 pt"
6. Type "ddf" to overwrite "def"
7. Press Ctrl + "z" to undo the last step

Actual Results:
Font size of the restored text "def" is now 12 pt

Expected Results:
Font size for "def" should be "11 pt" as it was before steps 6 and 7


Reproducible: Always


User Profile Reset: No



Additional Info:
(Version: 7.0.3.1; Build ID: 00(Build:1); CPU threads: 4; OS: Linux 5.4; UI render: default; VCL: gtk3
Locale: de-DE (de_DE.UTF-8); UI: de-DE; Ubuntu package version: 1:7.0.3-0ubuntu0.18.04.1)

Same result with LO Writer flatpak version 7.0.3.1