Question about AnalyticsObject

We implement a windows service for LPR Events from Milestone Server. We realize that sometimes the datatype from confidence property change. Normal it is a double. But sometime it is a string. Any suggestions?

According to the documentation this should be a double.

https://doc.developer.milestonesys.com/html/index.html?base=miphelp/class_video_o_s_1_1_platform_1_1_data_1_1_analytics_object.html&tree=tree_search.html?search=analyticsevent

I am curious about your observation, can you tell me more about your observation?