i use a razer atheris which worked perfect with 13.3.1, now it wont scroll with 13.4. i really cant imagine thats bug, because they tested this for sure. so thank you apple, once again, for not careing about your customer!
i bought this mouse especially for my ipad pro 2018 because you can change and save the direction of the wheel in the mouse (on win10 > synapse). for a windows user its an absolute hassel with a mousewheel which works the other way. it would be easy for apple to provide a switch in ios to change direction (again, they dont care). i would have bought an mac long time ago, but there isnt an affordable workstation ... thx again ...