**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: 3.1.0 Alpha, branch: master (modified), commit date: 2022-01-10 10:40, hash: `rB101fadcf6b93`
**Short description of error**
When drawing 3D widgets with the Gizmo/GizmoGroup API, with the "DEPTH_3D" bl_option on the GizmoGroup, the widget loses its depth culling when mouse hovered.
**Exact steps for others to reproduce the error**
- Prototype addon: {F12812489}
- Minimal test file: {F12798941}
- Notice how widgets' backfaces become visible when mouse hovering on them. The addon has some preferences to get different alpha amounts in different states. The issue is more visible when the "Delta Highlighted" value is lower.
{F12799053}
CC @campbellbarton