Hello @Tim_ClimatEU, that’s not a bug but it was developed as there were many requests to stick the footer to the bottom of the page if the application is shorter then the viewport. According to the logic we are adding a space that should take the color of the block above. If you don’t want that space to be added to your application you can use the custom CSS:
<style>
#BLOCKID .extra-div {
display: none
}
</style>
or if you just want to change the background color:
<style>
#BLOCKID .extra-div {
background-color: YOUR_COLOR;
}
</style>