Not fixed, not every time, but very often when opening UEFN it will use the UE assistant instead, and there is no way to switch to UEFN, it just spits out garbage about violating terms of service.
The assistant becomes unresponsive and cannot type messages.
When code is provided, the conversation slows down significantly after a few conversation.
Code output is sometimes incomplete (partial code).
The assistant fails to use proper code markdown formatting, instead displaying raw code as plain text messages.
Performance measurements show:
INP values increase from the expected 40–50 ms baseline to 5000–20000 ms.
Typing and message responsiveness are heavily impaired.
Makes the assistant impractical for real-time conversation or coding tasks.