For the past 6 months ( UE4 Version irrelevant ) UE4 begins compiling ~4100 shaders without me even opening a project. I have frequently found questions in the AnswerHub that had this issue with the projects shaders when it was opened. For me the moment the engine starts and I can select a project to pick it is already compiling. In addition, the process is abnormally slow than I am familiar with. Since this has begun UE4 has basically become useless for me please help!
Hey there, i had a similar issue and i just deleted the derived data cache on the AppData\Local\UnrealEngine\Common. I also deleted intermediate, binaries and saved folder in my project.
This did not work, yet it sped up the time it takes to compile shaders for me.