Hi ErKuehna,
Sorry that you have to encounter problems.
Please have a look at the results that I got:
Scene file
https://www.amazon.com/clouddrive/share/Sejx3vTJ2KJGUvlLSrjhTYQTyvfR3HaD8htZ9nuAx71
I used in R16 the Current State To Object function (CSTO), to get a polygon object from the SubDivision Surface. In R20 I reimported both. In R20 I did the same, CSTO, etc.
The only thing that showed to be a problem was the table. It didn’t want to be seen. I replaced it with a Cylinder Object and cached the simulation, named R20, new Table.
Is that what you have experienced? The Cloth falls through the table. Just run the Optimize function one time for the Table, if that was the problem, and perhaps set a new Collider Tag to it.
Each version changes something, and yes, it would be nice to have that always mentioned. Which would require that we go through over three thousand tutorials with each release and check every single part. Seems like a job for a larger team of people to get it done in time.
In the forum we respond to that and try to find solutions. As I did here.
https://www.cineversity.com/forums/viewthread/2463/
Of course to match exactly how it was, seems sometimes a little bit too much …, if there was no large project that needs that match, but then again, the golden rule of production is, Never change - never update during a project.
To make it work at all, that is what I hope fully did here. It seems that object caused the problem. Yes it was not causing it before.
Let me know if that was the problem.
All the best