When running a dynamic dump with PREIMAGE_DUMP YES in ctsrvr.cfg, the dump may ignore the !DELAY setting and block new transactions until all open transactions complete, including open SQL read-only transactions. The logic has been modified to correct this.
Workaround: Disable PREIMAGE_DUMP YES in ctsrvr.cfg and use an alternate backup approach to ensure a consistent backup (e.g., shut down the c-tree Server and do a file copy, invoke a c-tree quiesce operation using the ctquiet utility, etc.).