If a list have more cards than could show on the screen, the is no possibility to scroll in the list, because there is not enough space between the cards for tapping. I've testet it on Android Phone (Huawei P20 pro) and Iphone.
I do code Wekan features so that they work. Sometimes Chrome or some other browser removes some features or add some bug and then some Wekan feature does not work.
I'm not in a hurry. Think about it and tell me the result. I'm not asking for my self, i ask for my company and my boss will ask me that question, when i tell him, that he have to pay for a feature.;)