Created attachment 848762 [details]
sample document

OpenSUSE TW; libreoffice-calc-7.1.1.2-1.4.x86_6

 1 In the attached document, click right on A1 -> "Copy"
 2 Right-click on A2 -> Paste Special -> Paste special ...
 3 In the pop-up dialog, under "Selection", unselect everything and select
"Comments", and click "OK"

=> text in A2 is deleted

Expected results: Comment is pasted without clearing target cell content

Unsurprisingly, the same behavior is observed under Leap 15.2. (libreoffice
7.1.1.2-lp152.2.6.1).