Very narrow 3d polygons generate artifacts

[KatKatKateryna]

Hi! I have been successfully using DeckGL so far to display 3d polygon geometry. I have noticed that some specific triangular polygons display some extra artifacts around the polygon with coordinates [11.408439317323724, 48.76767105001015, 9.067481414794923], [11.408438376683101, 48.76765751198659, 3.505125004577637], [11.408439317227462, 48.767671276604354, 9.06066148223877]:

Expected behavior: grey triangle with thin black outline.
Other similarly-shaped polygons are displayed fine (coordinates [11.408439317323724, 48.76767105001015, 9.067481414794923], [11.408439409315765, 48.76767083095468, 9.073990901184082], [11.408438468675122, 48.767657292941585, 3.5116342002868652]):

Any ideas how this can be resolved? Thank you!