I am also facing same issue.
I have designed a Web-screen with some Input fields and used Data mask for those fields.When I enter the date in those fields
1.Only one Input accepts the date and other field got stuck after 3rd number
2.Unable to copy the date and paste in those input fields where as, it also got stuck with the 3rd number
3.The date can be entered in those fields at first time when web-screen is loaded and after the first try it got stuck
Help me to solve this issue
https://divya-panneer.outsystemscloud.com/Date_Validation/Date.aspx