*Steps to reproduce:*
# Open any Project
# Create an Animator and open it
# Create a Blendtree and double click it
# Select the Parent Blendtree State
# In the Inspector click the "+" icon near the Motion list and add a Motion
# Now make sure "Automate Thresholds" is checked and add a couple more Motions and observe Thresholds
# Remove Motion entries until only the first one with a Threshold of 0 is left
# Add more Motions

*Actual results:* After removing all Motions except the first Motion with a Threshold of 0 and then adding new Motions new Thresholds are not automatically calculated when "Automate Thresholds" is checked

*Expected results:* Motion Thresholds are automatically calculated whenever "Automate Thresholds" is checked, no matter the amount of entries in the Blendtree Motion list

*Reproducible with versions:* 2022.3.62f1, 6000.0.50f1, 6000.1.4f1, 6000.2.0b2

*Tested on (OS):* Windows 11