Intellij idea tool windows are missing upon launch
If you use gradle it might be a bug with the gradle panel. Edit workspace.xml and change the gradle window visibility to false.
<window_info id=Gradle active=false anchor=right auto_hide=false internal_type=DOCKED type=DOCKED
visible=false
show_stripe_button=true weight=0.1782284 sideWeight=0.4481203 order=16 side_tool=false content_ui=tabs />