Board Thread:Support Requests - Getting Technical/@comment-28712089-20191008204816/@comment-9605025-20191018195909

You are getting that gap because your border widths are not all the same. For that particular cell, you have "0.75px 0.75px 1px 1px" while for everthing else, you have "1px 1px 1px 1px". By the way, the latter can be written simply as "1px"; no need to write it out 4 times.