This document outlines all resolved bugs in the FastGPT 4.16.01 self-hosted release, covering sandbox infrastructure, frontend UI, tooling configuration, cloud storage, and security fixes for administrators and engineers.
Sandbox and Runtime Stability Fixes
This category addresses critical issues with sandbox resource management, concurrent operations, and file system access:
- OpenSandbox resources were not properly released or reused after stopping a sandbox instance, leading to potential resource exhaustion.
- State races and duplicate operations occurred during Agent Sandbox creation, restoration, and runtime upgrades, causing unstable sandbox behavior.
- Sandbox write operations to nested directories failed if the parent directory did not exist, blocking valid file creation workflows.
- Duplicate HTTP headers were present in MCP SSE mode responses, disrupting client-side event processing.
- Agent V2 system tool keys were stored unencrypted, creating a potential security vulnerability.
UI and Tooling Configuration Fixes
This section resolves frontend rendering errors and tool display inconsistencies:
- Number inputs switched to regular text fields when toggling between Agent-generated and manual input modes, breaking numeric data entry.
- String inputs were incorrectly rendered as dropdown selection fields, preventing free-form text input.
- The JSON Editor component was erroneously included in Workflow tool configuration panels, adding unnecessary interface clutter.
- Tool execution errors were displayed incorrectly across Agent and Workflow tool interfaces, hindering debugging efforts.
- Uninstalled system tools continued to appear in the system tool list, confusing users during tool selection.
- The default Agent/Agent V2 version selection no longer defaulted to the latest available version, requiring manual version selection for new agents.
Comprehensive Fixed Issues Reference Table
| Component Category | Detailed Fixed Issue |
|---|---|
| Sandbox Management | OpenSandbox resources not released/reused after stopping |
| Sandbox Runtime | State races and duplicate operations during sandbox create/restore/upgrade |
| Sandbox File I/O | Nested directory writes fail when parent directory missing |
| UI Input Fields | Number inputs switch to text on Agent input mode toggle |
| UI Input Fields | String inputs rendered as incorrect dropdowns |
| Workflow Tooling | JSON Editor incorrectly included in Workflow tool config |
| Tool Error Display | Incorrect error rendering for tool executions in Agent/Workflow interfaces |
| System Tool List | Uninstalled tools remain visible in system tool list |
| Agent Version Selection | Default Agent/Agent V2 version not set to latest release |
| S3 Storage | S3-hosted images with spaces fail parsing due to malformed keys (404 errors) |
| Security | Unencrypted Agent V2 system tool keys |
| MCP SSE Mode | Duplicate headers in MCP SSE mode responses |
All fixes are included in the official FastGPT 4.16.01 self-hosted upgrade package. No additional custom configuration changes are required to implement these fixes, though administrators may wish to validate sandbox and S3 storage integrations post-upgrade to confirm full resolution of reported issues.