Reproduction link or steps

https://stackblitz.com/edit/github-4uhyd9gk?file=tsdown.config.ts,package.json,dist%2Findex.js

What is expected?

The output is

let e=!1;function t(){return e||=!0,e}export{t as fn};

like it was in tsdown 0.11.12.

What is actually happening?

The output is

let e=!1;function t(){return e||(e=!0),e}export{t as fn};

It does not use logical assignment.

Any additional comments?

Found in vitejs/vite#20140