Reading through the April update notes it looks like many issues were addressed, but I don't see anything specifically for the Sleep Crash issue with the possible exception of the Intel 520 driver update "... and cases where the display does not reinitialize
correctly after the device resumes from sleep or hibernation." I have successfully installed the April 19 updates and will see if my SB can sleep though the night without a crash (it never has before).
Below are the update notes from MS:
Surface System Aggregator Firmware update (v88.1134.257.0) addresses a case where after you resume the Surface Book device from hibernation and detach the clipboard, the auto-rotate feature does not work.
Surface UEFI update (v88.1121.768.0) addresses screen flickering in Microsoft Edge and other applications.
Intel(R) HD Graphics 520 driver update (v20.19.15.4409) improves the overall stability of the graphics driver, resolves screen flickering in several popular applications, and cases where the display does not reinitialize correctly
after the device resumes from sleep or hibernation.
Intel(R) Display Audio driver update (v8.20.0.865) supports compatibility with the updated HD Graphics Family driver.
NVIDIA GeForce GPU driver update (v10.18.13.6200) adds support for some of the latest popular games.
Surface Camera drivers set (v30.10586.7035.1976) improves Windows Hello stability.
· Intel(R) AVStream Camera 2500 driver update (v30.10586.7035.1976)
· Intel(R) Control Logic driver update (v30.10586.7035.1976)
· Intel(R) CSI2 Host Controller driver update (v30.10586.7035.1976)
· Intel(R) Imaging Signal Processor 2500 driver update (v30.10586.7035.1976)
· Microsoft Camera Front driver update (v30.10586.7035.1976)
· Microsoft Camera Rear driver update (v30.10586.7035.1976)
· Microsoft IR Camera Front driver update (v30.10586.7035.1976)
Surface Camera Windows Hello driver update (v1.0.45.0) improves Windows Hello stability.
Surface Dock Integration driver update (v1.0.6.0) improves stability and compatibility with external monitors and passive video adapters.
Surface Dock Firmware Update (v1.2.6.0) improves stability and compatibility with external monitors and passive video adapters.