There is a bug with timelines not showing up while still being there in the 4.2.38 version
horse01-1.spine
103kB
Ghost Timelines Bug [4.2.38]
warmanw Thanks for reporting this! I was able to reproduce the problem in 4.2 and confirmed that it does not occur in 4.1 or earlier, so I think this is a bug that has occurred since 4.2. I have created an issue here for a fix: EsotericSoftware/spine-editor860