Reproduction link or steps

https://stackblitz.com/~/github.com/momei-LJM/tsdown_demo

preserveModulesRoot exhibits different behaviors in rollup and tsdown；

tsdown,

rollup:

What is expected?

My expected behavior is consistent with Rollup: files in the main directory should be extracted and hoisted out of the main directory.

What is actually happening?

preserveModulesRoot: Files not hoisted to parent directory

Any additional comments?

No response