I think I am seeing this same problem if i use the BLOB to get the frame, I am using the latest INDI and 3rd Party from GIT (as of this morning). If I use the Blob response I get a server disconnected message. If I instead read the file off the disk that is fine though as it appears and is valid. I just can't seem to just receive the raw data, not sure if its too big and causing a crash in the drive? I am doing RAW16 and no binning so the FITS is 120MB.