Accumulated `cats.data.WriterT` data not preserved from function passed to `fs2.io.readOutputStream`

When using fs2.io.readOutputStream in combination with an effect type that uses cats.data.WriterT, any data accumulated in the function passed to fs2.io.readOutputStream is not preserved. For example, I would expect the list of strings produced by this code to include both "string 1" and "string 2", but I only get "string 2":

import cats.data.WriterT
import cats.effect.IO
import cats.effect.unsafe.implicits.global
import fs2.io.readOutputStream

readOutputStream[WriterT[IO, List[String], *]](1024)(o => WriterT(IO((List("string 1"), o.write("a".getBytes("UTF-8"))))))
  .evalMap(x => WriterT(IO.pure((List("string 2"), x))))
  .compile
  .drain
  .run
  .unsafeRunSync()
// (List("string 2"), ())

I can reproduce the issue using this code (available in this repo: https://github.com/mrdziuban/fs2-readOutputStream-WriterT) on both v2.5.10 and v3.2.4.

Start with the fs2.io.readOutputStream entry point and reproduce the behavior using the WriterT example from the issue on the affected versions. Trace how the effect returned by the supplied function is evaluated and how its accumulated data is combined. Done means the result preserves both "string 1" and "string 2".