action command not using /me, instead just puts ACTION at the beginning of message

[ghost]

Actual behaviour:
When using the client.action command(channel, message), instead of sending a /me command to the channel, it simply sends a regular message with the word ACTION added to the front of it.

Expected behaviour:
The action command should send the /me command to the channel with the message.

Error log:
N/A

Insert your error log here

Server configuration

• Operating system: Windows 10
• Node version (if applicable):
• NPM version (if applicable):
• tmi.js version: 1.5.0

[AlcaDesign]

client.action is sending \u0001ACTION ${message}\u0001. Are you seeing "ACTION" rendered by the Twitch website or app with no third party extensions? How could I recreate this issue? Screenshots or something?

[ghost]

Yes, I'm seeing "ACTION" rendered on Twitch as well as the Streamlabs Chatbot. If it's working fine for you, I'm not sure how the issue could be recreated, but I was able to make it work by using this._sendCommand instead of this._sendMessage in commands.js:110. I used /me ${message} as the message parameter and removed the message transformation on line 107 that put the word "ACTION" into it.

[RedEars]

I've seen the same issue some times with client.say and could just replicate it. Seems to happen with longer messages. This happens if the text has line breaks.
No third-party extensions installed.

This call does not work/prints ACTION in chat:

 client.say(
channel,
        `/me technosterone test: 1. the main cause of [explosions].
2. any thing [dreaded] that your "teachers" say is "good" for you. soon after, you explode for no reason.
3. what scientists do to make stuff explode.
4. when a sheet of paper explodes into [flames].. monkaThink Por ejemplo: 1. test [sodium] and water.
2. SAT is a test.
3. [Monkeys].
4. you brought your [lighter] to test.`
);

This call works:

client.say(
        channel,
        `/me technosterone test: 1. the main cause of [explosions]. 2. any thing [dreaded] that your "teachers" say is "good" for you. soon after, you explode for no reason. 3. what scientists do to make stuff explode. 4. when a sheet of paper explodes into [flames].. monkaThink Por ejemplo: 1. test [sodium] and water. 2. SAT is a test. 3. [Monkeys]. 4. you brought your [lighter] to test.`
);

So if variables/text inside of the call has line breaks, it does not work and prints out "ACTION"

Screenshots:

(The define callback console log output is mine)