Atlassian MCP OAuth authentication broken in 1.0.80 (RFC 8414 §3.3 regression)

[ChandrasekarCK]

Describe the bug

Authentication failed: MCPOAuthError: Incompatible authorization server: authorization server advertised an issuer that does not match the URL its metadata was discovered from (RFC 8414 §3.3); refusing to connect.

Affected version

1.0.80 (worked in 1.0.78)

Steps to reproduce the behavior

1. Configure Atlassian HTTP MCP in  mcp-config.json  with type  http  and URL  https://mcp.atlassian.com/v1/mcp 
2. Run  /mcp  → select Atlassian → attempt to authenticate
3. Authentication fails immediately — browser OAuth redirect never launches

Expected behavior

OAuth browser redirect opens and authentication completes (worked in 1.0.78)

Additional context

Version: 1.0.80 (worked in 1.0.78)
OS: Windows 11
MCP Server: Atlassian HTTP MCP ( https://mcp.atlassian.com/v1/mcp )