When you update a preset in LR Classic, the ID associated to the preset gets a new ID. This causes other plugins to fail.
This was not the issue with the prior to 7.3 release.
Why does it need a new ID? What should the plug-in developers use to know the preset uniquely?
I am sure there is a good reason for doing this, if you shared it we might understand why it was necessary to do this.
Interesting. I guess a plugin would have to refer to a preset by its name and containing group name (preset:getName() and preset:getParent():getName()), which of course changes when the user renames the preset or containing group.
Adobe product developers generally don't participate in this forum. Please post a bug report to the official Adobe feedback forum: Lightroom Classic CC | Photoshop Family Customer Community . Adobe does read every post there and infrequently replies.