Tooltip window is not click-through on Linux

When the mouse is hovering over an asset, the asset cannot be selected/clicked if the tooltip pops up under the mouse. This does not occur on Windows and the asset can still be selected even if the tooltip is present.

1. Open UE4 Editor
2. Add blueprint based on actor (MyActorBP)
3. Add Static Mesh Component to MyActorBP
4. In the static mesh dropdown, move mouse over an asset such that the tooltip is over the highlighted asset (see screenshot)
5. Use LMB to select asset

Result:
Selected asset cannot be clicked while tooltip is present.

Expected:
Asset can be selected through the tooltip window.

Popup in drop down blocks ability to select object

[Linux][Ubuntu 16.04] Material Description Causes Failure to Click-through Selection