I have buttons on sheets that invoke macros. Recently (I think 6.3.1.2) they have started to constantly vibrate or shiver. The same occurs in 6.3.2.2. The sheets which display the vibrating buttons have macros and pivot tables that link to a base database. I have tried to replicate this behaviour in a simple (otherwise blank) sheet but have been unable to do so thus far. There are reports elsewhere - https://ask.libreoffice.org/en/question/208712/calc-6312-macro-button-problem/
Thanks for reporting this issue. This is a duplicate of bug 121963 *** This bug has been marked as a duplicate of bug 121963 ***