Nested `commandDir` with Typescript requires `visit` function to work

Using Yargs v17.6.2 with ts-node:
I'm trying to nest a couple of directories of commands using commandDir

level_1.ts

import yargs from 'yargs';

yargs(process.argv.slice(2))
  .commandDir('./level_1_commands', {
    extensions: ['ts'],
  })
  .demandCommand(1)
  .recommendCommands().argv;

level_2.ts

import { command } from 'yargs';

command('level_2 <command>', 'run all level 2 actions commands', (yargs) =>
  yargs.commandDir('./level_2_commands', {
    extensions: ['ts'],
    visit: () => {}, // required for it to work
  })
)
  .recommendCommands()
  .parseAsync();

level_3.ts

import { command } from 'yargs';

command('level_3 <command>', 'run all level 3 commands', (yargs) =>
  yargs.commandDir('./level_3_commands', {
    extensions: ['ts'],
    visit: () => {}, // required
  })
).parseAsync();

The only way for yargs to find the commands more than one level down is to include the visit param in the commandDir section. Without it the command would fail silently on the level 3 executions such as cli level_2 level_3 level3_command. I discovered the visit would make a difference while trying to debug.

Reproduce the nested command setup from level_1.ts, level_2.ts, and level_3.ts using yargs v17.6.2 with ts-node. Compare commandDir behavior with and without the visit option, especially for cli level_2 level_3 level3_command; done means nested commands are discovered without the workaround and the failure is covered by a regression test.