In Joomla 5 using the Helix Ultimate template, I would like to see bullets in a custom html – module: 

But in the frontend it doesn't show the bullets and has strange linebreaks.

The module with this problem can be seen on my test site at the right  at https://ottele.lu/en/
I have solved temporary the problem of the no show of bullets in <ul> by changing the Module Style from Inherited to html5.
But then the border of the module disappears because the border is defined by Module class boxed-module.
The bullets are in the backend, but no in the frontend... Is there a solution?