Despite its numbering on a low level V 4.2.7 contained a lot of new code and was rather buggy (imo). You might better upgrade to V4.3.5. If your linux distribution or its repository does not yet provide the version you need, you may study the advices by Hagar Delest and others in another forum. I know, there is advice from ubuntu not to install from the deb packages LibreOffice (TDF) provides. In case of urgency they recommend the PPA. Please refer to LibreOffice - Ubuntu Wiki .
Please also note: The xlsx is not yet fully supported (and will probably never be). If you have another choice at all: Best use the open document format (.ods for spreadsheet documents). If interchange with MS locked-ins is essential for you, better stick to xls. It’s may not be a better “format” but its support is developed for a longer time.