4.7.16

• Fixed an issue where missing map imagery or network failures could prevent the configured fallback map from being used.
• Improved fallback loading for incomplete and placeholder map tiles, including parent-tile recovery, so more map areas remain available when the primary source cannot provide a complete image.
• Improved recovery after temporary map-source failures by refining retry, caching, and request coordination behavior, including X-Plane DDS cache handling.

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• 修复地图缺图或网络失败时，可能无法使用已配置备用地图的问题。
• 改进不完整地图瓦片和占位瓦片的备用加载，包括使用父级瓦片恢复，确保主地图源无法提供完整图像时仍能显示更多地图区域。
• 优化地图源临时失败后的恢复机制，改进重试、缓存和请求协调处理，并改进 X-Plane DDS 缓存处理。