Steps to reproduce: - open a new writer document - insert a text area - enter some text - now track changes - try to modify the text in the text area => the text is permanently changed, track changes do not work inside the text area. By comparison, Word 2013 is able to track changes in text areas.
I can confirm this with Version: 6.2.0.0.beta1 (x64) Build ID: d1b41307be3f8c19fe6f1938cf056e7ff1eb1d18 CPU threads: 4; OS: Windows 10.0; UI render: default; VCL: win; Locale: en-US (de_DE); UI-Language: en-GB Calc: threaded and with Version: 5.4.7.2 (x64) Build-ID: c838ef25c16710f8838b1faec480ebba495259d0 CPU-Threads: 4; BS: Windows 6.19; UI-Render: GL; Gebietsschema: de-DE (de_DE); Calc: CL
*** This bug has been marked as a duplicate of bug 49361 ***