event_data("plotly_hover") not triggering for full range of 3D surface

I have a 3D space comprising four surfaces added as traces using add_surface. I hope to link these to a subplot using event_data("plotly_hover") (or event_data("plotly_click") ).

These events trigger correctly over some of the range of the surface, between x = 15 and 38 inclusive, but not the full range.

A more detailed description of the problem, including screengrabs showing event_data() working correctly and incorrectly, is provided here, along with a reproducible code example.

The desired use case for this feature is shown in the last two tabs of the app deployed here. The aim is in effect to perform 'tomography' on the surfaces along the age (x), year (y) and birth cohort axes (y-x). Within the range over which event_data triggers correctly this works really well.

从链接的 Stack Overflow 问题中的可复现代码示例开始，在整个 add_surface 范围内比较 event_data("plotly_hover") 和 event_data("plotly_click"). 当事件在全部四个 3D 曲面和完整的 x 范围内都能一致触发，包括 x = 15–38 之外的值时，即视为完成。