**System Information**
Operating system: Windows-10-10.0.17763-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics 600 Intel 4.5.0 - Build 26.20.100.7262
**Blender Version**
Broken: version: 2.90 (sub 0), branch: master (modified), commit date: 2020-04-24 09:34, hash: `rB47ae0affc8f2`
Worked: (newest version of Blender that worked as expected)
**Short description of error**
It shouldn't be possible to extend a sound strip beyond the end frame with the Duration value in the Time panel. When grabbing the handle the duration is clamped correctly. Gif: {F8493746}