[BUG]: svc.sh not generated after successful config.sh on LXC container (TLS/MTU issues)

[tsogtbatjargal]

What happened?

After running config.sh successfully with "Settings Saved" message, the svc.sh script is not generated. The agent registers in Azure DevOps but the service installation script is missing.
This appears related to network/TLS connection issues during configuration. The container experiences intermittent TLS handshake failures with default MTU 1500.

1. config.sh completes but svc.sh is not generated
2. Git checkout fails during pipeline execution with GnuTLS errors

Versions

4.264.2 and 4.268.0

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

Azure DevOps Services (cloud)

Operation system

Ubuntu 22.04 LTS

Version controll system

azure devops git

Relevant log output

Git checkout failure during pipeline::
git --config-env=http.extraheader=env_var_http.extraheader fetch --force --tags --prune...
remote: Azure Repos
remote: Found 289 objects to send. (65 ms)
##[warning]Failed to publish telemetry data. Error Resource temporarily unavailable
error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function.
fetch-pack: unexpected disconnect while reading sideband packet
fatal: protocol error: bad pack header

>> Connect:
Connecting to server ...

>> Register Agent:
Scanning for tool capabilities.
Connecting to the server.
Error reported in diagnostic logs. Please examine the log for more details.
    - /opt/azdo-agent/_diag/Agent_20260206-030430-utc.log
The HTTP request timed out after 00:01:40.
# curl output before MTU fix
curl: (56) OpenSSL SSL_read: Connection reset by peer, errno 104