Clicking end of sample or project

Hey all.
Have a problem as having clicking end of sample or project after mixdown. I have put a fade in fade out, made the audio wav zero point. try to render from MIDI to audio and snap to zero crossing. but the only way to stop the clicking is to put the export range just after the end of MIDI or sample. like a few seconds after the end of track. I need to get the timing right on the end as it is for radio ads that are only 15 to 30 seconds long.
Using cubase 9.5 pro.
Thanks !!!

Hi and welcome to the forum,

Could you please share the clicking sound? Maybe when we will hear it, we understand better what’s going on.