I save an xls file in MacOS Numbers version 10.1 and then open it in LibreOffice, all cells are without borders
Steps to Reproduce:
1. Open a file attached
2. See that all cells are without borders
All cells are without borders
A table cells are shown with border
User Profile Reset: No
Build ID: 8061b3e9204bef6b321a21033174034a5e2ea88e
CPU threads: 4; OS: Mac OS X 10.15.6; UI render: default; VCL: osx
Locale: ru-RU (ru_RU.UTF-8); UI: en-US
Created attachment 164015 [details]
A test file made by MacOs Numbers
Confirmed in LO 188.8.131.52.alpha0+ & 3.3.0 / Ubuntu.
Please also upload the file in native Numbers format, so if someone wants to see how Numbers generates the XLSX file, they can.
Created attachment 164138 [details]
original Numbers file