We are all working in Rhino 6, no older files coming from version before 6.15. So it is apparently a completely new issue. We haven’t had such problem before the last two months. At the beginning we thought it was just a human error, but then more people started experiencing it.
The biggest issue of the Autosave, is that it AUTOMATICALLY saves a version RIGHT AFTER the “mistake” is done. So when we try to open that recovery file, the content is already gone. even if we just saved right before opening the block. For us the temporary only solution is to keep on saving manually.
Only once, when trying to retrieve the Autosaved file, the recovery file opened with the BLOCK EDITOR window still open. We immeditaley copied the content of the block in a complete new file and, as we expected, when we clicked on OK on the BlockEditor in the recovery file, everything disappeared once again. Luckily we had the copy on the new file just created.