https://bugs.openldap.org/show_bug.cgi?id=9823
--- Comment #4 from Shawn McKinney smckinney@symas.com --- Note: Same behavior applies when consumer is also a provider (i.e. multi-provider). If a delta sync consumer's offline for longer than the purge interval of its providers, it won't receive the updates corresponding with those purged records.
The question, why doesn't it fallback into plain sync repl? Or, given some indication to the consumer (error) that it can't be brought back in sync, i.e. dsync has occurred.