ChatGPT displaying internal prompts - Is this normal?

I’ve noticed that ChatGPT sometimes displays what appear to be internal prompts or system messages in its responses. For example, I’ve seen things like:

search(“ChatGPT showing internal prompts issue”)
mclick([4, 7, 12, 19, 0])

These seem to be commands or debug information that should normally be hidden. I’ve attached a screenshot to this post so you can see exactly what I’m referring to.

Is anyone else experiencing this? Is it a known bug or expected behavior?

Here are some more examples of the issue.