Self-explanatory.
Repro:
-Get a brick, insert SurfaceGui in the brick then insert a TextBox Gui into the surface Gui.
-Attempt to click the Textbox; nothing happens.
Salutations!
Thank you for submitting this report. We are currently closing out older bugs that are no longer reproducible as we migrate to a new tracking system. Thank you for your patience while this issue was outstanding; our new process is designed to help us resolve incoming bugs more efficiently.
If you are still experiencing this issue, please file a new report via the Bug Wizard so we can take another look.