Material Base Pass Instruction Count will change from a value established when plugging in components pre-compile to a higher value on post compile, but when the material is reopened the count reverts back to pre-compiled level instruction count. The Shader Complexity View mode also seems to be using higher values.
Also reproduced in Launcher 4.9 Preview 4 and Main-CL-2666305
RESULTS: The Base Pass Shader without Light Map instructions have returned to 6 instructions, doing anything to initiate another compile will reset the instruction count to 25.
EXPECTED: The Instruction Count should not change unless additional information is added within the Material or an Attribute of the Material is changed.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-20321 in the post.