densy Hi, When spawn a spine offscreen, culling dose not work. Unity will no send OnBecameInvisible when instantiate mesh offscreen. And the spine default update mode is "FullUpdate". Please check.
Harald Good catch, thanks for reporting! A bugfix has been committed to the 3.8 and 4.0-beta branches, new unitypackages are available for download here as usual: Spine Unity Download Issue ticket for later reference: https://github.com/EsotericSoftware/spine-runtimes/issues/1883