TeleopPanel crashes when publishing messages under certain conditions

[pablopilotti]

Bug Description

The TeleopPanel crashes under certain conditions when attempting to publish messages. This appears to be related to the topic not being properly advertised before publishing.

Steps to Reproduce

1. Set DefaultLayout.json as Default DefaultLayout.json
2. Open a local connection (ws://localhost:8765)
3. Use the directional pad controls
4. Panel crashes intermittently

Expected Behavior

The panel should publish messages without crashing.

Actual Behavior

Panel crashes when trying to publish messages.

Environment

• Lichtblick version: 1.16.1
• Platform: Ubuntu Linux

Root Cause

The topic may not be properly advertised before attempting to publish messages, causing the publish operation to fail.

[ctw-joao-luis]

Hey @pablopilotti, sorry for the late reply! First of all thanks for your report! We're going to take a look at this and when we have some updates I'll let know!

Cheers,
João