Google Chrome in Kiosk Mode, touchscreen keyboard doesn't appear when a text entry box is touched

We have Windows 10 tablets that run a website in Chrome Kiosk mode. We have been running this solution for 2 years but all of a sudden when user clicks a text box the on screen keyboard doesn't pop up. The on screen keyboard settings are correct and the keyboard will appear correctly when I run the web page in Chrome in normal mode. I am either looking a workaround for this bug which I'm blaming on a Windows update Or Another way of displaying the website in full screen mode. I want this to be automated, in that as soon as the user logs in, the browser launches in full screen. I don't want any menu bars or charms from the browser visible on the screen. I've looked at Opera, Firefox but can't automate the process