System Information
Operating system: Linux-5.8.0-7642-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-13 13:17, hash: rB77744b581d08
Worked: Not sure
Caused by rBfcd2d63b644e: Fix 'GPU_matrix_unproject_3fv' not working with out-of-bounds points

Short description of error
An animator found in this specific file (and apparently others) they couldn't click the camera-axis transform gizmo from some angles, but could from others.

Exact steps for others to reproduce the error

• Open .blend file
• Try to translate the bone by clicking inside the inner white circle. Doesn't seem to work.
• Orbit the viewport around to the other side of the bone and try again. Now it seems to work!

Test File: