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Fixed
Fixed in 6000.0.55f1, 6000.1.15f1, 6000.2.0f1, 6000.3.0a4
Votes
5
Found in
6000.0.53f1
6000.1.13f1
6000.2.0b11
6000.3.0a3
Issue ID
UUM-111210
Regression
Yes
Persisted event listeners are reset when collapsing and expanding a component in the Inspector
Reproduction steps:
1. Open the attached “UnityEventsSerializationBug” project
2. In the Project window, select “Assets/TestUnityEvents/UnityEventTest_CustomInheritedMembers” or “Assets/TestUnityEvents/UnityEventTest_UnityInheritedMembers” Prefabs
3. In the Inspector window, collapse the “Test Unity Events” script
4. Expand the collapsed script
Expected result: UnityEvent listeners remain unchanged
Actual result: All UnityEvent listeners that are inherited class members are unassigned
Reproducible with: 6000.0.50f1, 6000.0.53f1
Not reproducible with: 2021.3.53f1, 2022.3.64f1, 6000.0.49f1, 6000.1.11f1, 6000.2.0b9
Reproducible on: macOS Sequoia 15.5 (M1 Max), Windows 11
Not reproducible on: No other environments tested
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zalogic
Jul 28, 2025 20:05
I would like to confirm a variant of this issue that is very hard to reproduce happens on Unity 6000.1.10f1 up to 6000.1.13f1. Some persisted event listeners get randomly lost but due to other editor actions not yet determined.
Still trying to find a pattern.
Hopefully this will also fix this adjacent and possibly related issue.