Hi!
We have encountered an issue where we want to be able to toggle the summary feature.
It works correctly if the feature is enabled from the start but if we enable it after the scheduler have loaded the summary row is incorrectly indexed.
This only happens when the horizontal scroll bar is not at the "start" of its scroll area.
It can be seen in the two pictures provided.
The "before_scroll.png" shows how it looks when the summary feature is enabled after the scheduler have been initialized and then the "after_scroll.png" shows that it is correct after scrolling horizontally.
The provided code example will hopefully give you some insights to what could be causing the issue.
Bryntum/schedulerpro: 5.0.5
Bryntum/schedulerpro-vue: 5.0.5
TypeScript: 3.9.10
Vue: 2.6.14