Hi Arjan,
Welcome on our forum

To solve this issue you can loop the sequence, open the sequence editor by selecting the sequence and press "Edit".
In the bottom you see all kinds of tabs. In the fist tab select the loop.
This should solve your issue.
Since the fade is from the "current" value to the maximum value, the dimmer will stay at 100%.
If the fade was made from 0 to 100% it would go back to 0 each loop.
Regards,
Bart