Unable to trim clips in the timeline with a second screen playback on

I am using Premiere Beta version 26.0.0 staticLib (Build 21). When working with my second monitor for playback full screen, I cannot use the selection tool to trim any clip in my timeline video or audio. No matter if snap is enabled or disabled. Or linked  to another clip or not. When you uncheck the second screen trimming using selection tool starts working again.