Some producers need to learn how to export multitracks. It's quite easy to do but some people mess it up. Often come across projects where I'd import the tracks and the vocals would be all over the place. Here are some tips to make the mix engineer not curse you out every minute

If you're just starting out, research how to export multitracks for your DAW. There are lots of tutorials online that'd put you through. When in doubt ask the engineer, do not be afraid to ask for help. Also, it's good practice to check the exported files to see if all is intact

Export all the files from the start of the song to the end. Everything should be exported starting from the same point so when the engineer imports it into his DAW, everything will align properly; so someone won't call you a bastard and make you sneeze anyhow this corona period

Some articles advise to reset the volume levels of the instruments before exporting, personally I don't like that. I prefer the multitracks to maintain the levels you have when you created the beat. The levels contribute to the vibe of the beat that the artiste must have liked

If you reset the levels, the engineer might interpret the song differently especially when they don't pay attention to the rough mix (happens sometimes). Saves you headache and stress of back and forths that could have been prevented

Clipping and distortion happens when a sound goes over 0db on the track meter. The way DAWs are designed now (something about 32 bit float) you might not hear the distortion while working but it will be present when you export. Happens often with kick in FL. So you have to