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 74), branch: master, commit date: 2019-07-11 13:50, hash: rB06312c6d2db8
Short description of error
In 2.8RC1 for the "VSE transform tools" add-on, when image is flipped in either X or Y axis the grab move function is not working. Video is attached with report.
Exact steps for others to reproduce the error
Open Video editing workspace
Enable "VSE_transform_tools" add-on
add an image strip
press "T" to activate add-on
in newly created adjustment layer strip go to "N" panel and in"Adjustment">"transform" tab enable "mirror" X o Y
and try to move image by pressing "G"
It doesn't move until "mirror" is turned off.