SAPUI5 - Timeline growing button is running the select function each time it’s clicked - sapui5

Question

I’m facing an issue with the default growing button in Timeline element. I have a select function attached to timeline and each timeline item can be clicked with the help of the select function.
However, I noticed each time I click on the growing button, it grows the displayed content AND it runs the timeline item that was hidden directly behind the growing button.
The work around I have in mind is hiding the original timeline growing button and instead I create a custom growing button that expands the displayed content each time it is clicked.
Appreciate any guidance if this is a bug with version I’m using (1.82) or I did something wrong in my code.
Sample (1.82):
XML:
<Timeline
id="idTimeline"
enableDoubleSided="false"
growingThreshold="5"
forceGrowing=“true”
sortOldestFirst="true"
showHeaderBar=“false”
select=“onTimelineItemSelect”
content="{/Messages}">
<content>
<TimelineItem
id="idTemplateItem"
dateTime="{date}"
title="{title}"
userNameClickable="false"
text="{content}"
userName="{emailAddress}">
</TimelineItem>
</content>
</Timeline>
JS:
onTimelineItemSelect: function(oEvent){
console.log(oEvent);
}