UI Rendering bug for a specific message (flickering)

Resolved 💬 2 comments Opened Jul 12, 2026 by nhauber99 Closed Jul 23, 2026

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.707.31428

What subscription do you have?

Pro

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

After pasting this specific message into any chat the UI starts to flicker.

What steps can reproduce the bug?

Paste this message into any codex thread:

>	SDesignerApp_Dll.dll!S::Transaction::HasChangesSinceSnapshot(const S::Entity & snapshot, const S::Entity & entity) Line 143	C++
 	SDesignerApp_Dll.dll!S::Transaction::CollectChanges() Line 353	C++
 	SDesignerApp_Dll.dll!S_M::`anonymous namespace'::RebuildNamedTransactionChanges(S_M::NamedTransaction * const namedTransaction, const S::Transaction & transaction) Line 179	C++
 	SDesignerApp_Dll.dll!S_M::TransactionChanges::Recalc() Line 200	C++
 	SDesignerApp_Dll.dll!S_M::`anonymous namespace'::RunTransactionChangesUpdate(unsigned int __formal, const S::VariantBase<8,0> & __formal) Line 752	C++
 	SDesignerApp_Dll.dll!S::TaskPoolTask<S::TaskPool<7,128>,1>::Execute(unsigned int __formal, bool execIfDeleted) Line 126	C++
 	SDesignerApp_Dll.dll!S::TaskPool<7,128>::ProcessSingleCore(int threadIndex) Line 183	C++
 	SDesignerApp_Dll.dll!S::TaskPool<7,128>::Process() Line 120	C++
 	SDesignerApp_Dll.dll!S::TaskPool<7,128>::Init::__l6::<lambda_1>::operator()() Line 44	C++
 	[External Code]	

Exception thrown: read access violation.
entity was nullptr.

This is a test. 

What is the expected behavior?

_No response_

Additional information

_No response_

View original on GitHub ↗

2 Comments

nhauber99 · 1 month ago

In case it's not easily reproducible, it switches between showing this and the actual message several times per second.

<img width="849" height="235" alt="Image" src="https://github.com/user-attachments/assets/83700178-8f86-4c0a-8a42-5284dc52e69f" />

nhauber99 · 1 month ago

This issue seems to have been fixed now.