Object, Vertex, Edge, Face Selection Tool is not selected in the Scene View on maximizing and minimizing the ProBuilder window, Refer to the attached video.

Steps to repro:
1. Create a new project.
2. Window > Package Manager > ProBuilder > Install
3. Create a new shape
4. Scene View > Object, Vertex, Edge, Face Selection Tool > Select
5. Tools > ProBuilder > ProBuilder Window
6. Docked ProBuilder Window > Maximize and Minimize
7. Repeat step 4

Actual Result:
Unable to select Object, Vertex, Edge, Face Selection Tool on maximizing and minimizing the ProBuilder window

Expected Result:
Object, Vertex, Edge, Face Selection Tool is selected gracefully

Reproducible in:
2021.1.0a1, 2020.2.0b8, 2020.1.10f1, 2019.4.12f1, 2018.4.27f1 with package version 4.4.0, 4.3.1, 4.2.3, 4.1.0, 4.0.2

Environment:
Windows10 and macOS 10.15

Workaround: Close and reopen ProBuilder window