Animation Events switch to the same function when toggling "Require Receiver" while the Animation Events are multi-selected

Steps to reproduce:

1. Open the "66ETs_Animation.zip" project
2. Open "SampleScene"
3. Open the "Move" Animation Clip
4. Select the "Cube" GameObject in Hierarchy
5. Multiselect the middle two Animation Events
6. Toggle the "Require Receiver" checkbox in Inspector
7. Observe the Inspector

Actual results: Both Animation Events switch to the same function

Expected results: The Animation Events remain as they were

Reproducible with versions: 6000.5.0b12, 6000.6.0a1, 6000.6.0a7

Can’t test with versions: 6000.0.77f1, 6000.3.17f1, 6000.4.11f1, 6000.5.0a7 (No Require Receiver checkbox)

Tested on (OS): Windows 11 Pro (25H2)