There are some display issues that occur in Avianis when using Private Browsing Mode in Safari. In order to turn this feature off, please follow the instructions below.
Click on the icon in the top right corner of Safari that looks like two pieces of paper.
2. If you are in private browsing mode, the word Private will have a white background and black text. If this is the case, click the Private button so it removes the white background and then click Done.
Ref: A-T40