Operating system: Windows-8.1-6.3.9600 64 Bits
Graphics card: GeForce GT 740M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 376.54
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Short description of error
When I added a marker in VSE the strip created by marker name hides the first channel which it should not do.
Exact steps for others to reproduce the error
Open VSE workspace add any strip in 1st channel and hit "M" to add marker.
Attaching video proof of that