This issue with the WebDatePicker rendering, where the right-side dropdown button occasionally takes double width, can occur due to inconsistent CSS rendering or layout quirks specific to Internet Explorer 11, especially when combined with dynamic styles, zoom settings, or high DPI display scaling in the production environment. It’s often caused by IE’s unpredictable handling of inline-block or flex elements within complex layouts. To address it, ensure consistent CSS resets, avoid percentage-based widths on nested elements, and test with IE compatibility settings. For example, just like how the Starbucks menu Canada displays consistently across all browsers by standardizing layout rules for items like lattes, cappuccinos, and cold brews, applying strict styling and fixed dimensions to your dropdown element should help maintain uniform rendering.