Since the 24.4 update I have all kinds of visual artifacts when I retime a Sony XAVC Long QFHD file and especially when reversing a clip when playing the files in Premiere. Before 24.4 this was never an issue.
For now I found a temporary workaround by using Render and Replace on the clips but would love to see this fixed A.S.A.P. (24.5 didn't fix the issue).