If you are a FuseSource subscriber then I suggest to use that channel to get the issue resolved quicker on the version you need.
And if have the time then you are welcome to check the changelog to find the ticket at Apache Camel that has the fix in the camel-ldap component. That makes it easier for FuseSource to take a look and backport the fix faster.
I checked & doublechecked. I did not find any matching patch. There is no timing/version and no subject-correlation to the issues I experienced.
There is only a few changes to camel-ldap itself. I found these, could it be related to your issue?
CAMEL-5260: LDAP Component lose headers
CAMEL-4796: Applied the for loop patch. Thanks to Babak for the patch.