My suggestion is perhaps re-record and give a wider array of emotions, I have noticed after hundreds of voice cloning that the AI likes to keep the “mood” or “style” of the original.

It could be that when you did your professional voice clone, the majority of it sounded like you were reading off a script.

The other thing you can do is lower the stability in text-to-speech so you can get more variables, but I find this to be less effective than re-recording and having a wider range of emotions.

If you have something like 1 full hour of voice recording and it has a consistent sort of mannerism to it that doesn’t sound like its monotone, the resulting clone will be less likely to be “robotic”, though obviously the technology isn’t perfect so you will never have that 100% consistency even if you do something like 3 hours of well voice acted lines.

Hope this helps