I added details on the github issue tracker
https://github.com/EsotericSoftware/spine-runtimes/issues/1833
When running spine-ts in a web worker, it crashes due to a recent spine-ts change to support iOS 14 (it may be more of an iOS issue with an earlier version of iOS 14, but discussion in github, if you want me to move the discussion here instead, let me know.)
