Keynote Narration recording problems

I'v just replied to a similar post with this way of recording a voiceover:

An alternative way of doing this is to record the narration direct on to each separate slide:

We always use this method as it is more acute and flexible and the sound can be replaced very easily and quickly.

• first create the slide auto advance by using Record Slideshow, but do not record sound. Turn the sound down to zero the external mic being used in Apple menu > System Settings > Sound > Input

• second, create the sound recordings direct on to each slide using: Insert > Record Audio

Remember to set the external mic back to the correct recording level again in System Settings

No such problems on any of our systems here, using 5 different Mac OS and numerous Keynote versions.

Some things to try:

• do not use any antivirus, cleaning or optimising software
• do not use Chrome browser
• reset Keynote as follows:

complete all of the following steps in the order listed:

1. close all applications
2. uninstall Keynote; for this procedure to work, an application removal tool must be used, App Delete has a free trial and works for this procedure. It can be downloaded from the developer’s website here:  App Delete
3. empty the Trash (Finder > Empty Trash)
4. restart the Mac (Apple Menu > Restart);  Immediately after the Apple startup sound, press the shift key on the keyboard, release shift when the Apple icon appears. Start up will take longer than usual as the Mac is performing a software repair of the start up drive
5. After the Mac is fully powered up, restart the Mac normally:   Apple Menu > Restart
6. reinstall Keynote from the Mac App Store Application
7. Restart the Mac again

You can easily mimic it.

• Open "record slideshow" from the play menu.
• Start recording your voice, move to next slide
• Then stop the recording (Imagine you did a mistake or spelled incorrectly a word)
• You need to go back slightly, just before you made a mistake to start the recording again
• Then you start recording (keynote ask you if you are sure because you will erase the part after that point)
• You answer Yes/OK

At that moment, you will notice that the mic level indicator at the bottom left is not moving anymore.

You can continue, but nothing is happening.

After you finish, if you want to listen to recording, it will stop at the point that you rewinded before.

Note : I have a recording showing that, but I am not able to share it in this post

Same here, since last year.

Apple is too big to solve our small issue.

Now, I use an external screen recording instead of the native "record slideshow", it's a shame.

I have the issue on my iMac, my macbook pro and I tested also on my daughter macbook air.

Same issue everywhere.