If the issue is the same as MDCCLXXVI's video, I can confirm the exact same issue happening on 5th July (IIRC before 1.48's release), I only have a screenshot to prove it ( http://steamcommunity.com/sharedfiles/filedetails/?id=476038262 ), it started happening short before I had to go and last 2 weeks I haven't played a lot so I probably cannot provide more information.
My system is Windows 10 Pro Insider Preview (impossible to know that moment's compilation because I am on the fast ring), and at that moment I was using AMD Catalyst 15.6 BETA on an HD7970Ghz Ed. GPU, no custom malloc and totally vanilla game (with custom launch parameters such as maxmem=4096, maxvram=3071, exthreads 7, enableht, nologs, nofilepatching, skipintro... ), with the game on SSD...