"Tool window" doesn't open correctly after collapsing - Build 2506 Windows



I have encountered a problem with the Tool Window (Tools - Tool Window) in the specified build. When I launch Interface and open the Tool window, it opens fine. However, it takes forever to load (yet to check if it does load at all), but collapsing it turns out to be a bad idea, because once it is collapsed, it shows on the Windows tray panel, but when I try to make it active, it closes (disappears from the tray).

When I make a different program active and then go back to Interface, in the tray panel, the icon appears as there are two windows related to that application are open (= Tool window is “back”) , and when I try to make it active, it closes again. It cannot be found in Task Manager either.

The only way to open it properly again is to restart Interface.

OS Version: Microsoft Windows 8.1 64-bit
CPU: Intel® Core™ i5-3230M CPU @ 2.60GHz
Memory: 12 GB
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce GT 640M