"Parameter does not exist" warning is spammed every repaint when entering a non-existent trigger name on a Button with Transition set to Animation

How to reproduce:
1. Create a new Unity project
2. In the Hierarchy, right-click -> UI (Canvas) -> Button - TextMeshPro
3. In the Inspector, under the Button Component, change the Transition to Animation -> Auto Generate Animation
4. Under any "Trigger" enter any string that doesn't match any existing parameter
5. Observe the Console

Expected results: Only one warning is thrown
Actual results: Multiple warnings are thrown during the text entering

Reproducible with: 6000.0.76f1, 6000.3.15f1, 6000.4.8f1, 6000.5.0b9, 6000.6.0a7

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested

Note: The warning spam is not necessary as it also happens when the user only starts entering the text, and even of the end result will match the parameter name, the warnings will be thrown anyway until the string is complete