CDO

I am using the latest CDO release 1.9.2.
When I use option "-f srv" in conjunction with operator "splitseas", the seasonal output files are given the incorrect extension ".ext". When I use "-f ext" the output files are given the extension ".ieg", and when i use "-f ieg", a file extension is not given. The option "-f nc" works fine, but the output file extensions when converting formats to srv, ext, and ieg seem to be offset by one. Just wanted to bring this to your attention and check if there is a way to fix this. Thanks!