Thank you for the precision @oppi.
In fact, this was an issue in the previous version, that should now be fixed with 1.3.4.6:
Kindly let me know if this is resolved on your end.
As for the custom CSS, I apologise for the confusion.
This is actually an expected behaviour, considering that no styles are added to the pagination block, meaning that there is no active class.
To add custom CSS, without adding any styles to the block, be sure to force the class using the following button:
I hope this helps clear up the confusion.
Please don’t hesitate to let me know if you have any questions on this.