Brush edit not visible in real time

A recent update to photoshop Lightroom has caused issues to the brush tool. Now when highlighted I can no longer see my edit in real time. I have to drag my cursor over to image in order to see the changes I made. This is so time consuming and frustrating. Should I uninstall the update? Was so excited for it but now my work has been delayed for 4 days waiting for tech to get back to me.