Plugin crashes on macOS and Linux during project load due to UI call inside deserialization

[ThomasKroes]

Summary

When loading a project that contains a scatterplot plugin, the application crashes on macOS and Linux. The crash does not occur on Windows.

Root Cause

The crash happens during project de-serialization.
Specifically, a UI-related function is invoked as part of the plugin’s de-serialization logic.

Calling UI code during de-serialization appears to be unsafe on macOS and Linux (likely due to threading and/or event loop constraints), and results in an application crash. On Windows this currently works, but this behavior is platform-dependent and not safe.

Technical Context

• Crash occurs while loading a saved project
• Plugin de-serialization triggers a UI function
• UI interaction during de-serialization leads to instability

Expected Behavior

Des-erialization should be:

• Pure data reconstruction
• Free of UI side effects
• Platform-independent

UI initialization or updates should occur after de-serialization, once the object is fully constructed and the UI layer is in a valid state.

Suggested Fix

Refactor the plugin so that:

• De-serialization only restores state
• UI updates are triggered in a post-de-serialization phase
  (e.g., after the plugin is fully constructed and registered)

This would ensure platform-safe behavior and eliminate the crash.