I have been having this same issue. I have posted in other spots here before with no response. 

I did just try your steps above and it did not make any difference. (Reset keyboard, refresh browser, browser (CHrome) is updated, tried incognito mode, and then tried a different browser and all the same. 

It seems that once I type anything into the description box of any service/line item, it no longer lets me move it. I have been using QBO for about 2+ years, on same computer and browser with no issues before. 

Is this any sort of update issue or change in system? Any help would be great! thanks.