**System Information**
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.59
**Blender Version**
Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-13 08:07, hash: `rB2ec6eca518ef`
Worked: (newest version of Blender that worked as expected)
**Short description of error**
{F8469588}
**Exact steps for others to reproduce the error**
1. Move backdrop with {key Alt}+{key MMB}
2. Drag corner of frame