Drop downs of the combo box opens only on multiple clicks when any other drop down is open

[rkunjappa]

Combo box Drop down Toggle Issue

While using multiple combo box , the dropdown opens only on multiple clicks

Detailed description

The Drop downs in combo box doesn't open unless the user clicks on it multiple times, this happens when the user keeps any drop down open and tries to open another drop down.
This issue is related to combo box and Drop down component.
The expectation here is the drop downs should open on single click.
I have tested this behaviour in Chrome , Safari and Firefox too
We are using the below version of carbon

• "carbon-components": "10.18.0",
• "carbon-components-angular": "4.38.0",
  I am working on MCMP-AIOPS project, where we are seeing this issue