Since we upgraded our development servers from Domino 8.5.3 to 8.5.3 FP1 we encounter a very strange problem. We use the xe:viewJsonLegacyService to ouput the view contents in json format and dojo xhrGet with param sync:false.

This way we are able to fire multiple requests at once to the xe:viewJsonLegacyService xagent page and process them when the request is done.

After FP1 the sync:false is not usable anymore, if we fire three requests it will return error 500 for two requests and as success on one request. I created an example database which shows you what goes wrong. But I'm not sure this is because of a problem the Extension Library. Please test my example database.