Description:
I cannot use the "Track changes" feature with formulas. Formulas that are deleted during Track Changes are replaced by an "Object N" (where N is an integer). This way, it is impossible to reject a change related to a formula because it is gone.





Steps to Reproduce:
1. Create a new Writer document.
2. Insert a formula
3. Enable "Track Changes"
4. Delete the formula. 
5. Save

Actual Results:
Result: The formula is converted to an unknown "Object N" (attachment)

Expected Results:
Expected: The formula stays in place and is striked through so that one can review and accept/reject the change. 


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Version: 7.1.4.2 (x64) / LibreOffice Community
Build ID: a529a4fab45b75fefc5b6226684193eb000654f6
CPU threads: 8; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: de-DE
Calc: threaded