@Suty Where can I see AIFS as an ECMWF extension?
In addition, the accuracy of ECMWF's rainfall forecast in the past half year has been very poor. This is very different from before. What is the reason?

@Ondřej-Šutera Imac

I often find that when I drag the slider under a certain layer, the image of the layer remains unchanged, but after a while, when I slide it back, I see the image change. This is obviously a problem where the data loading is not completed during dragging or the animation code does not respond in time.
I imagine it would be more noticeable if the network is slow or the CPU load is too high. I think you may understand this situation without recording the screen.
Considering the differences in network speeds around the world, I don't think this is a very uncommon situation. Please consider the judgment mechanism.
Especially in some countries, "you seem to be offline" will appear. So is there preloading in windy to deal with network restrictions? If so, the preloaded data may not be complete data. How to judge whether the data displayed by the weather is real after "offline" appears?

Can you show whether the data is loaded?
During use, we often see the phenomenon that data is not loaded due to network reasons. How long should we wait? Is the current data real? These can easily cause counterproductive effects. It is hoped that there will be a mechanism to judge the data loading situation.