initialConfig in custom tooltip is empty when collapsedSeries are used

[bmanth60]

Description

When new options are provided to the chart and updateOptions is called while there are hidden series, the series data in the initialConfig are cleared

apexcharts.js/src/modules/Series.js

Line 104 in 0e7addc

series = this.emptyCollapsedSeries(series)

Steps to Reproduce

1. console.log chart.w.globals.initialConfig.series with a hidden series
2. Update the series using chart.updateOptions
3. console.log chart.w.globals.initialConfig.series with a hidden series

Expected Behavior

I am expecting that initialConfig should always provide unadulterated initial config

Actual Behavior

initialConfig removes data from hidden series

Screenshots

Reproduction Link

https://codepen.io/bmanth60/pen/ogbGpGa

[bmanth60]

Just wondering if anyone can confirm or deny my expectations. If I can get confirmation on the design and intent, I can provide a PR for this