Advertising from free TV during Netflix or AmazonPrimeVideo, why?

Lately, it regularly happens that on my SmartTV (Samsung 55Q9FN (Model 2018) QLED UHD TV), advertising suddenly comes to the fore during the Netflix or Amazon Prime app.

I think that it is the advertising from the FreeTV. I had, as that occurred again, times switched to the KabelTV input and then ran the same advertising as just at Netflix.

How can that be and more importantly, how can I turn this off

I have never had it now. If the Samsung does not do well you can look over a Chromecast or FireTV.

This may have something to do with hbbtv, this funny red button. Turn off the device and try again.