Reproduction link or steps

https://bundler.sxzz.dev/#eNrtUT1vwyAQ/SsnFhLJ8g9A8tihc8emg2WOiAofFh+tJYv/XqjtuEk9ZMoUBuDd4x539yammJiYJoljHXy5ExMbrlhXYD9YF4C35LXnJ8phZCK4iKlizhoj7TfVnSWlz/XnRWWHmfVw/NWTqNpoAkwnAhhMPGvyAt4LgjlYFrU9CuA4BnTUGl6thENvzRe+yoOWFcw1ojtumQBaQSahaZq1+Ct6ebBk1po6EyX6A++tzN3z483r8meIjmCC8uVakoAyigpyVjT4piW+KIVdyM2o1niE9FckAZbY/cI36Ru4XNMyk/n8yHumWPZm7mP1Y0F7nv5zNA77fl7Fn24+0M2UfgBXKxww

• Switch to Rolldown
• Click anchor icon of mod.ts for enable/disable entry file, repeatly

What is expected?

A consistent behavior:

• In Rollup, the ansis import is always not tree-shaken.
• In my opinion, it should be tree-shaken if moduleSideEffects is set to false and not set to true (undefined) anywhere.

What is actually happening?

The ansis import is sometimes removed (tree-shaken) unpredictably.

System Info

N/A

Any additional comments?

No response