Bug report: Step button bakes the full recipe when reaching a comment in the middle

**Describe the bug**
I have `Comment` steps in the middle of my Recipe

When I am baking step by step, with the step button, reaching a `Comment` step will cease stepping and will proceed to bake the rest of the recipe.

**To Reproduce**
[Here is a sample recipe that will cause the bug to reproduce](https://gchq.github.io/CyberChef/#recipe=Comment('1')XKCD_Random_Number()Comment('2')To_Hex('Space',0)):

```
Comment('1')
XKCD_Random_Number()
Comment('2')
To_Hex('Space', 0)
```

1. Load this recipe
2. Click on 'Step'. The next instruction, highlighted in red, is `XKCD_Random_Number`
3. Click on 'Step'. The full recipe has been baked, there is no next instruction highlighted.

**Expected behaviour**
After step 3, the next instruction is either the second comment, or the `To_Hex` instruction.

**Additional information**

* When the comment is removed, everything works as expected.
* When the comment is disabled, the problem still occurs

**Desktop**

This seems to be independent of OS and Browser. Reproduced under Debian and Windows 10, on Edge and Firefox.