Keeps forgetting objectives

Question

### What version of Codex is running?

0.63.0

### What subscription do you have?

Pro

### Which model were you using?

gpt-5 high

### What platform is your computer?

Linux 5.15.0-139-generic x86_64 x86_6

### What issue are you seeing?

Unusually bad performance, keeps misunderstanding most requests even though they are really simple and it was a fresh session

### What steps can reproduce the bug?

Uploaded thread: 019abdbf-0ac1-7261-8c74-9117c05deec1

### What is the expected behavior?

_