*Steps to reproduce:*
# Create a project with 6000.0.8f1;
# In the "Hierarchy" window make a right mouse click and select UI;
# Select "Text - TextmeshPro"
# Click" Import TPM Essentials;
# Go to the "Inspector" tab;
# Scroll to the "Material" section, which should be below the "Extra Settings";
# Click the material hierarchy popup button;
# Change "Material" to "Material Variant";
# In the "Material Variant" window click "X";
# Observe the window behavior;
# Or in the "Material Variant" window set "Parent" to "Anton SDF - Drop shadow";
# And play with the "Children" dropdown.

*Actual results:* Two videos are added in the "Attachments" section.

*Expected results:* Window changes should be smooth, without the window/text distortions.

*Reproducible with versions:* 2023.3.0a2, 6000.0.8f1

*Not reproducible with versions:* 2022.3.26f1

*Can’t test with versions:* 6000.0.6f1

*Tested on (OS):* MacOS, Sonoma 14.5