ADDITIONAL SYSTEM INFORMATION :
Java 1.8, Windows 11, 15GB Ram

A DESCRIPTION OF THE PROBLEM :
I created Map object Map<String, Set<String>> map=new LinkedHashMap<>(); and was storing unique numbers in key and String values in value, after 96th object stored in map, I suddenly noticed that if 97th key object is getting updated with the values based on key in 97th key object, it also updating 96th key record values. Initially I thought it was some mine mistake, but tried several time, and confirmed that it seems some issue with Java 1.8.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Store 100 objects in map, update multiple values in map;s values.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
on updating map's object value based on key, it should update only particular key values not earlier key values as well.

FREQUENCY : always