Compatibility Chisel Top name error

Here is the bug repetition repository:
https://github.com/sequencer/rc_topname_bug
CI should illustrate this error:
https://github.com/sequencer/rc_topname_bug/actions/runs/746420331
Reproduce on the local environment:
run with docker: `archlinux/archlinux:latest`
install dependencies: `pacman -Syu --noconfirm make parallel cmake ninja python mill dtc verilator git llvm clang lld`
repetition: `make patch; make test`

TestHarness io is wrong:
```
module TestHarness :
input clock : Clock
input reset : UInt<1>
output in_0_b_bits_io : {success : UInt<1>}
```
which should be
```
module TestHarness :
input clock : Clock
input reset : UInt<1>
output io : {success : UInt<1>}
```
I doubt the auto naming stack management exists some potential error, but failed to figure out.

**Type of issue**: bug report
**Development Phase**: request

Start by cloning the linked rc_topname_bug reproduction and running `make patch; make test` in the specified Arch Linux Docker environment; compare the generated TestHarness interface with the expected `io` output. Use the linked CI run to confirm the failure and trace the auto-naming behavior responsible for `in_0_b_bits_io`; done means the generated interface matches the expected name and the reproduction passes.

Written by the indexing model from the issue text.