I usually uses ECMWF when viewing forecast in windy.com, but recently I use GFS for comparison, and there is a mismatch between wind speed contour and vector (image attached for Aug 4, 2017 GFS prediction over western Pacific Ocean SE of Japan). I uses the newest version of google chrome (WebGL enabled) in Windows 10 environment.

Snow accumulation error...
This bug is appearing randomly, but usually after setting a new accumulation time / set zooming / or clicking a random region after dragging the flag (which was behaved normally). The pattern is "work normal - set new zoom / accumulation time / re-click a region - drag the flag - abnormal behavior". Thanks for your concern.

The sea surface temperature indice is wrong, hahahaha...
Thank you for noticing.

Please bring back the height option like the old version.