`Field resolution` selecting only first member for nested union (bitfield)

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Since Jun 16, 2025.

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Description

Component: Core State: Awaiting Triage

Version and Platform (required):

  • Binary Ninja Version: 5.1.7539-dev
  • Edition: Commercial
  • OS: Windows 10
  • OS Version: 10.0.26100 Build 26100
  • CPU Architecture: x64

Bug Description:
For nested unions (or bitfield) field resolution sets always first element of bitfield (in my case AutoBoostActive). Even when I select next.
Image

Steps To Reproduce:
Please provide all steps required to reproduce the behavior:

  1. Go to NtGetContextThread
  2. Right click on AutoBoostActive
  3. Click on Field Resolution
  4. Select SystemThread
  5. See that nothing changed

Expected Behavior:
It should change to SystemThread, but it doesn't.

Binary:
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