FWIW
In my experience, this is *sometimes* caused because the effects have a buffer that runs beyond the end of the song (time wise). This has happened here in other DAWs also.

To try and explain; if your FX take more time to actually 'happen' than the song is long, it will be abruptly stopped and be interrupted and cut off. The program stops before the sound should.

I've seen this issue also result in the buffer emptying itself the next time you hit 'play' (and causing a thwack/click when you click play and the song starts).

Give the song enough time to let the FX finish emptying their buffer.
IOW, make the song longer. Usually just recording empty space at the end of any track will accomplish this.
In my experience, recording a couple seconds of audio (on any given track at the end of the file) always solves this.


Make your sound your own!
.. I do not work here, but the benefits are still awesome