Two different object with same API name, one is part of managed package. Getting collection store error

Question

I have installed a managed package on my org. That managed package has an object with same API name as one of my custom objects. I have a trigger on my custom object where I query my object and assign it to a list. When I query SF runs my query on my custom object but when it comes to collection SF is using managed package object in collection and thus, I get collection store error "System.TypeException:Collection store exception adding all list to list

Map<id,SurveyInfo__c> surveyMap = new Map<id,SurveyInfo__c>([ SELECT Id,Name FROM SurveyInfo__c Limit 10]);
List<SurveyInfo__c> surveyList = new List<SurveyInfo__c>();
surveyList.addAll(surveyMap.Values());

Above code is for custom object. In query I get custom object but my lists formed are for managed object i.e. namespace.SurveyInfo