[Bug] setting duration as a function does not work correctly.

[xuefei1313]

Version

2.0.12

Link to Minimal Reproduction

https://www.visactor.com/vchart/playground?specId=0450757730&timestamp=1766663564770&version=2.0.11&theme=light

Steps to Reproduce

link中demo可以复现

Current Behavior

函数被调用，但是无法正常生效

Expected Behavior

能正确使用函数返回值

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response