For this scenario I recommend clicking a nearby container element the link is inside, and then using the directional controls to move down to the link element. So you don’t click the link element directly. Alternatively, if you have clicked the show advanced link in targeting mode, clicking on the line of HTML for the link will select it. And so too will clicking the breadcrumbs.
Yes I’m aware of Oxygen. And I’m keen to ensure Microthemer works well with all page builders. If you’ve noticed any compatibility issues, please feel free to send access details via our secure contact form so that I can troubleshoot.