when minimizing the ModelBuilder window in ArcMap (ArcGIS Desktop 10.7.1) it disappears from screen. The minimization animation happens (genie effect into the bottom left corner), but there is no button to maximize the ModelBuilder window again. Minimizing and maximizing the whole ArcMap window makes the ModelBuilder reappear. When opening tools, another "bar" is however shown in the Windows toolbar, minimizing and maximizing works for that if this is relevant. The behaviour was observed on two machines.
Using Windows 10 Pro on ASUS ZenBook 14.
I'll provide additional information of needed.
Thank you and best regards,