Zoho Mail and CRM not accepting key strokes on Chrome

Zoho Mail and CRM not accepting key strokes on Chrome

Hi

Tonight, Zoho - mail and CRM is not accepting all key strokes when accessed via Chrome - e.g
- I, O, P etc keys to the right do not work
- backspace and delete keys do not work
- K creates an "Insert link" dialogue box
- and other weird stuff

Text in Mail also starts out as right-aligned and underlined

I have tried 
- restarting Zoho mail (& logout / login) - no effect
- trying a different keyboard - no effect
- typing in Chrome in e.g Google Earth searcj box - all keys work perfectly
- opening Zoho Mail and CRM in Windows Edge - all keys work perfectly
- testing my keyboards in Microsoft word & excel - all keys work perfectly

This post was entered on Microsoft Edge

Can you please resolve?

Thanks

Ross