Translation: there’s a very loud sound (0dB) at the very end, which you can’t see unless you zoom-in on the end.
It’s probably the click noise when the recording device was switched off, (there’s one at the very start).
The loud clicks can be deleted by zooming-in on them, selecting them, then pressing delete key.
You also get an unwanted saturated loud click near the very when you use Timer Record (I use it to record streaming audio from the interweb). Oddly it does not happen every time - just most times AFAICT.