Yeah, are you using the Chrome browser on Android mobile?
If so, then it’s a recognised bug in Chrome.
I believe there is a fix in the works for it so when Chrome next gets updated it should be OK. Nothing we can do about it though until Google works its magic.
One thing you can try is to click above or below the button you’re trying to press by the height of the URL bar in the browser. But it’s still very fiddly.
Edit: here’s the Chromium bug report.