unless you know how to format a webpage (or unless the page has very little formatting), there will be differences in display. you need to learn how to format a webpage and you need devices to test with. in the case of a note 10, you have to get one or get a screen capture of what it looks like. but that only addresses the note 10. other devices may show other issues. if your code (html and/or javascript) makes assumptions about where the page will be displayed, you're asking for problems. eg, if you hardcode things like "width=100px", 100 pixels looks different on different devices. hard-coded image sizes will look different on different screen sizes. that could easily force text to display on top of itself.
if you don't have the resources for test devices, you'll need to work with screen captures and see if you can figure out how you're causing the text to display incorrectly.
by the way, showing and image and some text in a webview, isn't the only way to handle this. you could do it in b4a with, eg, a formatted label. there is still the issue of different devices with different screen sizes, but questions regarding uniformity across devices have been asked here many times. plenty of links in the forum for you to hunt through.