With Polaris UI, the email client ui script does not auto-expand properly with long semicolon separated recipient listsDescriptionWith Polaris UI, the email client ui script does not auto-expand properly with long semicolon separated recipient lists. Compose email pop-up will show up with messed up recipient fields.Steps to Reproduce Click on the email client icon from an incidentCopy in a large list of semicolon separated email addresses into the to fieldThe to field does not expand and the scroll bar is too small to use. The issue does not always happen depending on the browser version, window size and recipient list text.WorkaroundEmail client is not designed to have so many recipients. Customers are encouraged to use DL distribution lists or group email addresses that exist on their company side to include many recipients in only one address. Alternatively, the KB article below that explains the possibility of an UI script to increase the height size of the email client form. Since this is a customisation, customer should test and make sure it works according to their business needs: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB1121625Related Problem: PRB1587218