I've brought this up a long time ago, but it hasn't changed in Logos 8.
In a nutshell I try to cycle through resources open in a tab using the arrow keys and eventually Logos brings up a resource that HAS NO PARALLEL RESOURCES leaving me unable to move to any other resource! It's like a train driving off the end of the tracks. There's no way back. The parallel slanted bars go away.The tab has to be closed and I have to start from scratch by finding and opening one of the resources I had previously shown.
The idea behind cycling through resources in one tab spares me from having multiple tabs open in a pane for resources I might use, like multiple commentaries and lexicons. However, the simple truth is that I can't count on Logos demonstrating a consistent behavior so I have to go back to opening multiple tabs.
Why are you unable to fix this?