This is happening on Windows 10 and LO 7.0.6.
I start a component of LO, and I see the splash screen pop up and almost immediately disappear, and almost immediately pop up again and disappear again, et cetera ad nauseum, and in my case the nauseum is no joke. The only way I’ve found to break the cycle is to pull up task manager and stop the process soffice.exe. This doesn’t happen every time, so I don’t know how to replicate it. I don’t see a bug report for it. Has anyone else experienced this?
It could be caused by a left behind lock file. Check if your working directories contain a file with the string
.~lock.FILENAME.odt# (ODT or others)
is left in your working files and delete it.
If this is not the case, proceed as described in “First steps”: