Reproduction steps:
1. Open the attached “IN-104552” project
2. Open the “Behavior Graph” in the Behavior Graph window
3. Open the “TestAction.cs” Script
4. Make sure at least one of the variables has a character near the square brackets
5. Observe the “TestAction” Action in the Behavior Graph window

Expected result: Variable is parsed as a variable and lets you set the value
Actual result: Variable is parsed as a string

Reproducible with: 1.0.0, 1.0.11 (6000.0.51f1, 6000.1.7f1, 6000.2.0b5)
Couldn’t test with: 2022.3.63f1 - Behavior package is not supported

Reproducible on: Windows 10, Ubuntu 24.04
Not reproducible on: No other environments tested