Windows 10 64bit Libre Office 6.3.3.2 Portable app
Prepare 1) Start Calc 2) Start memopad or any text app and write any words. TESTING 1) copy any words at memopad. 2) paste any cell on Calc. 3) copy any cell on Calc. 4) copy any words at memopad. 5) paste any cell on Calc. Now you may confirm normal operation. Repeat TESTING several times. You will encounter the strage situation. --You can't paste 4th copied words, you will paste 3th copied things at calc. But if you paste on memopad, 4th copied word will appear on memopad.-- I tried start to safemode, all clear profile, once it is solved but the same symptoms will occur if this operation is performed several times.
Please see if this is a duplicate of bug https://bugs.documentfoundation.org/show_bug.cgi?id=62196
@Maba, I see your comment https://bugs.documentfoundation.org/show_bug.cgi?id=62196#c89 - is it duplicate of bug 62196?
I guess we may close. *** This bug has been marked as a duplicate of bug 62196 ***