⚓ T215608 Table border collapse in Timeless

Also had this issue. As a temporary workaround, go to the MediaWiki:Timeless.css page on your wiki and add:

table {
  border-collapse: separate;
}

To reproduce this issue, simply try creating a table with rounded borders on a wiki:

{| style="border: 2px solid red; border-radius: 5px;"
! Header !! Header
|-
| Cell || Cell
|}

The expected result is rounded corners. The actual result is square corners. This works fine on non-Timeless skins because Timeless is the only one that has:

table {
  border-collapse: collapse;
}

If there isn't a valid reason for Timeless to have that property, please remove it.