The min-height: 1px fixes that, but my concern is this affects unexpected parts (or not)

I just had to remove that line as it breaks our logic: we have 4 cards next to each other with 1 card header, 2 card bodies and 1 card footer. The second body contains the same content in all 4 cards (checks and crosses as they reflect packages with different availabilities). The upper body contains an individual explanation so the content length is different. To have all cards the same height I set up class="card h-100" and for the first body class="card-body h-100". This gets totally messed up when the min-height is provided and it seems there is no way to override that rule and set it to unset, initial, 0px whatever. Once it is present it messes up things.