I consistently get this message in the upper left. Eventually, I will get the data, but it usually takes either time, or closing the app and re-opening, or going to a totally different location.
It renders the app useless for me especially when I need it.

I have been using using Windy for several years and I have found that the last 6 to 9 months it has been very in accurate. This has mainly been in southern California as well as the Sea of Cortez.
Many of my other sailing friends have experienced the same. I use mainly use two sources, NAM and ECMWF based on update time.
Example, I am off the coast of southern California right now Windy shows the wind SW at 5 kts gusting to 7. Actual true wind is coming from the W at 1-2 kts.
Other days has shown times the wind at 8 kts for several hours but the actual true wind turns out to be 12 gusting to 16.
Has anyone else had this experience?