After publishing an existing powerapp to the latest version the used font looked different on a tablet (only used the default open sans font). After a test in a sperate powerapp it seems that most fonts are reverted to the same default font when the power app is opened on a mobile device. In the web studio when editing or running the powerapp the fonts looks fine. Apps published in hte previous version are ok, while new and republished apps show the wrong font.
Also, placing labels with a fill colour on a background with the same fill colour gives some black lining on the edge of the label. (I know I can just make the labels transparant 🙂 ). This also first ocurred when publishing to the latest version.