Thanks for reported, it will log this issue into our codebase, we will see what we can do in the next release version.

Infact there are other issues with the bad words filter function:

1. No filtering takes place at all.
2. The words which are already filtered continue to show as stars even when I delete them from the list of bad words.
3. bad words are shown as stars even if they are part of other words and are not standalone words.

1. No filtering takes place at all.

Do you mean content section?

2. The words which are already filtered continue to show as stars even when I delete them from the list of bad words.

I've tested in my locally, it seems work fine.
Can you specify which discussion post from your test site, so that we can better have a test?

3. bad words are shown as stars even if they are part of other words and are not standalone words.

Yes, I already added in our issue tracker.