Here's a 2nd fix for the forum topic Need Help with Publii Glitches in Author and Tag Descriptions, which uses the Simple theme. Demo of issue:
I'm assuming you're editing the main.css file in a theme override. If you're using "Custom CSS" inside Publii, try to override every rule that has to be deleted using "unset" (ex: .hero { position: unset; }
)
Delete or comment out the following three lines inside the .hero
rule:
.hero {
height: var(--hero-height); /*delete this line*/