I have had my vehicle from new. For several years it has randomly vibrated at stop signs etc and also when parked in neutral.
Have taken to dealer several times for this and they can never seem to locate the issue. Last spring I left it with them asking for a tech to take home and drive to feel the problem. When I picked it up they had put new engine mounts on and never drove it more that a few blocks. Still have issues. Sometimes it actually feels as if it is going to stall on me. I am pretty disgusted with Hyundai as the Sonata hybrid I had previous to this had to have a new engine."..twice. Brother.
They always say the computer doesn’t show anything. Is there any answers out there?

 

There is a lot going on here.
First , if they can't see/feel the problem or know how to produce it, they have no way to verify if they repaired it.

Second; some places have no idea where to look or go without some direction from the possible code(s) in the computer.
If you asked 3 different people to describe an engine misfire , you could get 3 different answers. Vibration, ready to stall, hesitates etc.

If nothing else what if I asked you some questions, and maybe the answers could suggest something, OK?

How many miles are on the vehicle right now?
When was the last service and what was done?
Do you have any records as to what repairs were done and when?