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On the Browsing workspace, there is the Properties window which is synched to the IDE`s current node selection. If it is displaying multiple tabs for the current node selection, and you click on an alternate tab, the Properties window clears (displays no tabs). Probably it is getting the node selection from itself and becoming confused? This does not happen with the non-OB "Open Properties Window" global action.
Priority is changed to P4 (normal).
Verified in build 1100 and 31.
Resolved for 3.4.x or earlier, no new info since then -> closing.