I updated my project to Kendo UI for jQuery 2020.3.1021 but then all Grids stopped working on mobile or tablet devices. When downgrading to 2020.3.930 grids works fine. Also tried it with 2020.3.1028 but same issue.
I have tested it on iPad, iPad Pro, Samsung S10. Same issue with Chrome/Edge Chromium and emulate a mobile/tablet device.
Reproduction of the problem: