How to remove a random purple line from Calc

[gagamonstar]

So when im using calc sometimes this purple line pops up. It acts like a border for the row, but i cant remove it.

[bencomp]

Can you share more details please? What version are you using, on what operating system? When does it occur (e.g. only empty cells, only filled cells)?
As @mariosv asked, could you share a screenshot?

[mariosv]

Hi @gagamonstar, can you share a screenshot of what you see or a file with the issue.