When dynamic actions are displayed between two presentations, they are not displayed at all. Here is a snippet to reproduce this problem. I've committed a fix in the Moose51 repo.
browser := GLMTabulator new. browser row: #one; row: #two. browser transmit to: #one; andShow: [ :a | a tree display:[ :x| 1 to: x ] ]. browser transmit to: #two; andShow: [ :a | a tree display: #(a b c); filterOn: [ :text :each | each name includesSubstring: text ]; dynamicActions: [ :list | {GLMGenericAction new action: [ ]; title: 'Action'; icon: GLMUIThemeExtraIcons glamorousBrowse; yourself} ]]. ^ browser openOn: 5