I have a shiny new iPad Pro 11 (which I’m delighted with) and have been doing some work on PDFs - filling forms using markup and then adding simple text boxs. All was going well until the following day I when back to re-edit the text. When I select the text box and then edit, the text box background turns black!!! The text is still there but its black text and a black background. I don’t know why its happening and I’ve no way to turn the text box background back to white. It is REALLY annoying me!! The files are saved in my Files on iCloud and my iPad iOS is 12.3.1 It is also happening on my iPhone iOS 12 and my ancient iMac (late 2009 with High Sierra) If anyone can shed some light on it I would be super grateful!!