I don't see the code is changed. It remains same. If you're sure that you have changed the code then please make sure you remove the joomla or T3 caches too https://www.dropbox.com/s%2F5ju6tzzim8bc8p3%2Fhitradio%2520namibia%2520-%2520meine%2520musik.%2520mein%2520sender.%25202021-07-22%252013-13-41.png?raw=1
Would there not be a way to change something in the coding of Carousel Banner, so that it also takes the original banner size rather than the container sitze?
Just for info; I changed the container size to 75% (as it is very easy through T3 Framework, I was just not aware of it), but Banner Carousel still shows it on 50% width...
The problem is too specific with your template. If you can share temporary access to your website admin I will try to find a solution. You can share it in the 'Your Site Details tab below'. Only you and support staffs who are able to see it.
