I've now bought three G502 Hero mice with the same problem: after <6 months of routine use (I just use them for day to day home office needs - no gaming), when clicking and holding the left mouse button it will suddenly stop registering the hold.

So I'll be dragging a window across my desktop and it'll stop and my pointer will continue going. Almost worse, sometimes the click registers again and I accidentally click something else!

One mouse I could believe. Two is unlucky. Three in a row has to be some sort of systemic manufacturing error, right?

I don't know what to do about this. Can anyone recommend a similar style mouse? I bought this one because I like the shape and size of it and I was hoping that the Logitech brand and hefty price tag would mean quality, but apparently not ...