claude-code - 💡(How to fix) Fix [Bug] Fork subagent cache not functioning properly, causing rapid token limit depletion [1 comments, 2 participants]

[{"error":"Error: VirtualMessageList: duplicate sibling keys (leaks DOM nodes via mapRemainingChildren overwrite): 5a4bc038-3d94-4ec8-8d38-f0e526b82b48-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 2aa73687-b562-46cf-a4a5-a603437d2dac-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 5e280a3e-ab6a-4b26-a835-ce6af1f44de4-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2\n at w75 (/$bunfs/root/src/entrypoints/cli.js:6498:9256)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:6498:903)\n at TD (/$bunfs/root/src/entrypoints/cli.js:497:30320)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:485:9137)\n at wq4 (/$bunfs/root/src/entrypoints/cli.js:6498:895)\n at sA (/$bunfs/root/src/entrypoints/cli.js:497:21130)\n at a3 (/$bunfs/root/src/entrypoints/cli.js:497:39896)\n at l9 (/$bunfs/root/src/entrypoints/cli.js:497:50705)\n at cU (/$bunfs/root/src/entrypoints/cli.js:497:87759)\n at qJ8 (/$bunfs/root/src/entrypoints/cli.js:497:86717)","timestamp":"2026-05-04T22:47:55.240Z"},{"error":"Error: VirtualMessageList: duplicate sibling keys (leaks DOM nodes via mapRemainingChildren overwrite): 5a4bc038-3d94-4ec8-8d38-f0e526b82b48-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 2aa73687-b562-46cf-a4a5-a603437d2dac-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 5e280a3e-ab6a-4b26-a835-ce6af1f44de4-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2\n at w75 (/$bunfs/root/src/entrypoints/cli.js:6498:9256)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:6498:903)\n at TD (/$bunfs/root/src/entrypoints/cli.js:497:30320)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:485:9137)\n at wq4 (/$bunfs/root/src/entrypoints/cli.js:6498:895)\n at sA (/$bunfs/root/src/entrypoints/cli.js:497:21130)\n at a3 (/$bunfs/root/src/entrypoints/cli.js:497:39896)\n at l9 (/$bunfs/root/src/entrypoints/cli.js:497:50705)\n at cU (/$bunfs/root/src/entrypoints/cli.js:497:87759)\n at LW$ (/$bunfs/root/src/entrypoints/cli.js:497:87731)","timestamp":"2026-05-04T22:48:13.850Z"},{"error":"Error: VirtualMessageList: duplicate sibling keys (leaks DOM nodes via mapRemainingChildren overwrite): 5a4bc038-3d94-4ec8-8d38-f0e526b82b48-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 2aa73687-b562-46cf-a4a5-a603437d2dac-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 5e280a3e-ab6a-4b26-a835-ce6af1f44de4-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2\n at w75 (/$bunfs/root/src/entrypoints/cli.js:6498:9256)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:6498:903)\n at TD (/$bunfs/root/src/entrypoints/cli.js:497:30320)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:485:9137)\n at wq4 (/$bunfs/root/src/entrypoints/cli.js:6498:895)\n at sA (/$bunfs/root/src/entrypoints/cli.js:497:21130)\n at a3 (/$bunfs/root/src/entrypoints/cli.js:497:39896)\n at l9 (/$bunfs/root/src/entrypoints/cli.js:497:50705)\n at cU (/$bunfs/root/src/entrypoints/cli.js:497:87759)\n at qJ8 (/$bunfs/root/src/entrypoints/cli.js:497:86717)","timestamp":"2026-05-04T22:48:32.590Z"},{"error":"Error: VirtualMessageList: duplicate sibling keys (leaks DOM nodes via mapRemainingChildren overwrite): 5a4bc038-3d94-4ec8-8d38-f0e526b82b48-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 2aa73687-b562-46cf-a4a5-a603437d2dac-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 5e280a3e-ab6a-4b26-a835-ce6af1f44de4-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2\n at w75 (/$bunfs/root/src/entrypoints/cli.js:6498:9256)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:6498:903)\n at TD (/$bunfs/root/src/entrypoints/cli.js:497:30320)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:485:9137)\n at wq4 (/$bunfs/root/src/entrypoints/cli.js:6498:895)\n at sA (/$bunfs/root/src/entrypoints/cli.js:497:21130)\n at a3 (/$bunfs/root/src/entrypoints/cli.js:497:39896)\n at l9 (/$bunfs/root/src/entrypoints/cli.js:497:50705)\n at cU (/$bunfs/root/src/entrypoints/cli.js:497:87759)\n at LW$ (/$bunfs/root/src/entrypoints/cli.js:497:87731)","timestamp":"2026-05-04T22:48:50.200Z"},{"error":"Error: VirtualMessageList: duplicate sibling keys (leaks DOM nodes via mapRemainingChildren overwrite): 5a4bc038-3d94-4ec8-8d38-f0e526b82b48-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 2aa73687-b562-46cf-a4a5-a603437d2dac-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2, 5e280a3e-ab6a-4b26-a835-ce6af1f44de4-d1ccd8c5-1736-4554-b019-1ef3cf8ac7e3 ×2\n at w75 (/$bunfs/root/src/entrypoints/cli.js:6498:9256)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:6498:903)\n at TD (/$bunfs/root/src/entrypoints/cli.js:497:30320)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:485:9137)\n at wq4 (/$bunfs/root/src/entrypoints/cli.js:6498:895)\n at sA (/$bunfs/root/src/entrypoints/cli.js:497:21130)\n at…

TL;DR

The issue is likely caused by a cache problem with the fork subagent, leading to duplicate sibling keys and DOM node leaks, and may require adjustments to cache management or key uniqueness.

Guidance

• Investigate the cache implementation of the fork subagent to identify potential issues with key uniqueness or cache expiration.
• Review the VirtualMessageList component to ensure it properly handles duplicate keys and updates the DOM without leaking nodes.
• Consider implementing a cache invalidation mechanism or adjusting the cache timeout to prevent stale data from causing duplicate key errors.
• Verify that the error messages are not caused by a known issue in the version 2.1.126, and check for any available updates or patches.

Example

No specific code example can be provided without more context, but ensuring unique keys for VirtualMessageList items and properly handling cache updates could help mitigate the issue.

Notes

The provided error messages suggest a recurring issue with duplicate sibling keys, which may be related to the fork subagent's cache management. However, without more information about the implementation details, it's challenging to provide a precise solution. Further investigation into the cache and VirtualMessageList component is necessary.

Recommendation

Apply a workaround by adjusting the cache management or key uniqueness in the VirtualMessageList component, as the issue seems to be related to cache problems and duplicate keys, and there's no clear indication of a fixed version available.