Subform Lookup field showError doesn't clear in Client Script

I have a lookup fields Deal, Account and Lead in Subform, I am checking if its null or not

If its null It shows an error, but when I select some value for the Lookup Field it doesn't clear the error , for other fields such as single line or pickup etc. it clears the error

Is it a client script bug or issue with my code I am not sure

My use case is the user has to enter data in atleast one field Deal, Account or Lead

var subform = ZDK.Page.getSubform('Meeting_Details');

var subform_length = subform.getValues().length;

for (var i = 0; i < subform_length; i++) {

    var row = subform.getRow(i); // Get row object

    var dealValue = row.getCell("Deal").getValue();

    var leadValue = row.getCell("Lead").getValue();

    var accountValue = row.getCell("Account").getValue();

    var activityDetail = row.getCell("ActivityDetail").getValue();

    log(dealValue);

    if (dealValue == null) {

        var dealCell = row.getCell("Deal");

        dealCell.showError("Empty Deal");

}

    log(activityDetail);

    if (activityDetail == null) {

        var activityCell = row.getCell("ActivityDetail");

        activityCell.showError("Empty Activity");

}

}

Moderation Update: I'm locking this post as this issue has been resolved and is live across all the DCs. If you need further clarification, feel free to start a new topic.