This is pretty easy to workaround, but thought I'd mention it.
If I minimize Sapphire, then minimize L3DT, the Sapphire window and Taskbar icon disappears and there does not seem to be a way to recover the Sapphire window to continue working. Pressing the "P" key does not recover. There is no icon the restore or maximize.
The only option appears to be to Save and kill the L3DT process in Task Manager.