This used to work perfectly but for some reason, it is not working as intended.
If I export JSON from Spine, and copy and paste it to the already existing JSON location folder, not all, but some events are removed in the process. I attached the two files so that you can see them.

I assure you that the update process worked well before the recent update. It updated the event keyframes without additional touches.
PS. I'm using Spine Mechanim and afaik these animation clips were auto-generated with that.

Spine 4.1.11 and spine-unity 4.1

Harald wrote

Could you please send us your problematic exported Spine assets (the three files)? You can send them to contact@esotericsoftware.com, briefly mentioning this forum thread so that we know the context. Then we can have a look at what's going wrong.

I just sent them. I hope there's a way to fix this.

Harald wrote

Thanks for sending the reproduction assets, we received everything.

Strangely the animation born of the .json skeleton file does not contain any events at all (which obviously explains your observed behaviour). If you are you sure that it does in your project, could you please also send us the Spine project files? Please also briefly mention this forum thread URL in your email as a reference, so that we know immediately where it belongs to.

I included the project file in the same zip file I sent. You can check it out.