Hello
I have seen this before - but those were quite obscure conditions ....
Anyway - please create the filelists that Andre already asked for.
I would also like to see the last two vmware.logs of the VM that does not behave itself.
For worst case I have a workaround that copies the flat or delta files using ddrescue in readonly mode.
Fixing the problem would be the faster option so please give us something to work with.