Is anyone familiar with the issue where the subnavigation on a Webflow website is being positioned absolute over the whole page and moving when scrolling on certain combinations of browsers and operating systems? Is there a workaround to fix this?

Yes, I'm familiar with the issue you're experiencing with the subnavigation on a Webflow website. The problem you described, where the subnavigation is positioned absolutely over the entire page and moves when scrolling on certain combinations of browsers and operating systems, can be challenging to address. However, there are potential workarounds you can try to fix this issue. Here are a few suggestions:

1. Sticky positioning: Instead of using absolute positioning, you might consider using the CSS `position: sticky;` property. This property allows an element to become sticky and remain in its position based on the user's scroll position. By applying this property to your subnavigation, you can anchor it to a specific position on the page while still allowing it to scroll with the content. Please note that sticky positioning may not be supported by all older browsers, so you should check the browser compatibility before implementing this solution.

2. JavaScript scrolling events: You can also harness JavaScript to detect the scrolling behavior and adjust the position of the subnavigation accordingly. By utilizing the `window.onscroll` event, you can listen for when the user scrolls and then dynamically modify the CSS properties of the subnavigation element based on the scroll position. This approach provides more control over the subnavigation's positioning and behavior across different browsers and operating systems.

3. CSS media queries: Depending on the specific browsers and operating systems causing the issue, you might be able to target them using CSS media queries and apply different styles or positioning rules to address the problem. This approach involves identifying the problematic combinations of browsers and operating systems and writing specific CSS rules that only target those scenarios, ensuring the subnavigation behaves as expected across different environments.

4. Browser-specific CSS: If the issue is limited to specific browsers or browser versions, you can use CSS hacks or specific browser prefixes to target and modify the subnavigation's positioning for those cases. Although using browser-specific CSS is generally discouraged, it can be a last resort when other solutions are not feasible.

It's worth mentioning that thoroughly testing across multiple browsers and operating systems is crucial to ensure your website's subnavigation behaves consistently and as intended. Also, keeping an eye on Webflow's updates and community forums might provide insights into any known bugs or issues related to subnavigation and scrolling in specific browser combinations.