Dependencies check up

• I have verified that I use latest version of all @mantine/* packages

What version of @mantine/* packages do you have in package.json?

8.1.3

What package has an issue?

@mantine/core

What framework do you use?

Vite

In which browsers you can reproduce the issue?

Firefox

Describe the bug

When having cells with rowSpan > 1 and column borders, the resulting "sub-rows" do not have a column border.

If possible, include a link to a codesandbox with a minimal reproduction

https://codesandbox.io/p/devbox/mantine-react-template-forked-dw6lqw?file=%2Fsrc%2FApp.tsx%3A29%2C1&workspaceId=ws_QxeLZv7KFshBEKowzyTfNg

Possible fix

No response

Self-service

• I would be willing to implement a fix for this issue