Used google a bit…
It seems to be check by your security system, which tries to guess “suspicious” behaviour. Can often give false positives, because advanced techniques like allowing extensions, using java can look similiar to techniques used by “suspicious” software to load malware.
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You will find reports also for Word or even Windows-Update. An older incident for LibreOffice (with some instructions):
https://forum.openoffice.org/en/forum/viewtopic.php?t=106075
But keep an eye on your environment. Malwarebytes may sometimes be right, even if a lot of false alerts are happening.