Reproduction steps:
1. Open the attached “Repro“ project
2. Open the “EnumFlagsFieldExample“ Custom Editor Window (Examples > EnumFlagsField Example)
3. Select “A” and “B” in the first field’s dropdown
4. Select “A“ and “B“ in the second field’s dropdown
5. Observe both fields

Expected result: “AB“ is selected in both fields
Actual result: Only “A“ is selected in the second field as it behaves unpredictably

Reproducible with: 2022.3.14f1, 2022.3.17f1,
Not reproducible with: 2021.3.39f1, 2022.3.13f1, 6000.0.5f1,
Fixed in: 2022.3.18f1

Reproducible on: M1 MacOS 14.4.1
Not reproducible on: No other environment tested