Reproduction steps:
1. Open the attached “IN-126923” project
2. Right-click the main Toolbar and enable the “Timescale/Timescale Slider” control
3. Right-click on the “Timescale Slider” control
4. Observe the context menu options

Actual result: Two separators next to each other are showcased
Expected result: Only one separator is showcased

Reproducible with: 6000.3.3f1, 6000.4.0b3, 6000.5.0a4
Couldn’t test with: 6000.0.65f1 - Custom toolbar controls feature is not available

Reproducible on: Windows 11, Windows 10 (user)
Not reproducible on: No other environments tested

Note:
- Sometimes the extra line is not rendered, but it’s very inconsistent