Crash when editing headers

I’m running Libre Office 6.3.4.2. on Mac OS 10.14.6
I’m on Calc spreadsheet and I go “insert → headers and footers” to edit headers. As soon as I try to type in the editor box, Libre Office crashes.
I’m writing in both English and Japanese, but it doesn’t matter what I write in, it crashes every time.
It’s not the end of the world for not having headers on my spread sheets, but it would be nice.
Anyone had same problem? Any way to fix this?

Does this also happen, if you start LibreOffice in Safe Mode and performing the same operation?

There is an UNCONFIRMED bug report #tdf129620 - Crash when I press down arrow in edit header dialog about that. May be you could leave a message that you are affected too (my test macOS 10.15.1 using 6.4.3.2 doesn’t crash)

Yes, it still crashes. Perhaps it is OS 10.14 problem. Thanks for the tip. I will leave message on that bug report.