The Java debug pane is not expanding the keys in a HashMap

Start with the sample Bug.main entry point, stop at the marked breakpoint, and inspect m in VARIABLES or m.entrySet() in WATCH using the reported Java and VS Code setup. The issue is done when HashMap nodes expand and all entries are visible even when a Map.Entry local variable exists.

Problem: HashMap nodes are unexpandable when a Map.Entry local variable exists (screenshot attached)

Sample code

package com.tech.maven;

import java.util.HashMap;
import java.util.Map;

public class Bug {
    public static void main(String[] args) {
        Map<String, String> m = new HashMap<>();
        m.put("employees", "500");
        m.put("department", "IT");

        // Put your breakpoint on the line below  ←←←←←
        System.out.println("breakpoint here");

        // After you stop here, look at "m" in VARIABLES or WATCH → m.entrySet()
        // You will see only one entry (or unexpandable nodes) if the bug is still present
    }
    
}

VScode & Extensions Environment

JavaSE 17 (Temurin)

Version: 1.106.3
Commit: bf9252a2fb45be6893dd8870c0bf37e2e1766d61
Date: 2025-11-25T22:28:18.024Z (3 days ago)
Electron: 37.7.0
ElectronBuildId: 12781156
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.5.0

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{
message: 'Nov 28, 2025 5:42:36 PM org.apache.aries.spifly.BaseActivator log\n' +
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timestamp: '2025-11-28 17:45:50.541'
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{
message: 'Nov 28, 2025 5:53:53 PM com.microsoft.java.debug.core.UsageDataSession recordResponse\n' +
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{
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timestamp: '2025-11-28 17:55:37.868'
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{
message: 'Nov 28, 2025 5:55:39 PM com.microsoft.java.debug.core.UsageDataSession recordResponse\n' +
'WARNING: abnormal response\n',
level: 'info',
timestamp: '2025-11-28 17:55:39.318'
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{
message: 'Nov 28, 2025 5:55:41 PM com.microsoft.java.debug.core.UsageDataSession recordResponse\n' +
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level: 'info',
timestamp: '2025-11-28 17:55:41.167'
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{
message: 'Nov 28, 2025 5:56:04 PM com.microsoft.java.debug.core.UsageDataSession recordResponse\n' +
'WARNING: abnormal response\n',
level: 'info',
timestamp: '2025-11-28 17:56:04.218'
}