Boundary layer working oddly on long edges

[TheCrowned]

There seems to be some weird issue with boundary refinement through the addition of a boundary layer. If the line along which to refine is too long, the refinement will be spotty. Instead, if I add more points to the boundary and refine all the edges connecting them, then the refinement is nice and smooth. Switch between points1 and points2 in the code below to see the difference.

Here is the (bad) result with points1:

Here is the (good) result with points2:

Obviously the expected outcome (at least to me) is the second.
Tested with pygmsh version 7.1.14.

import pygmsh

points1 = [ (0,0,0), (10,0,0), (10,1,0), (0,1,0) ]
points2 = [ (0,0,0) ] + [ (x,0,0) for x in range(11) ] + [ (10,1,0), (0,1,0) ]

points = points2
with pygmsh.geo.Geometry() as geom:
    poly = geom.add_polygon(points, mesh_size=0.05)

    # Refine
    refine_lines = [poly.curve_loop.curves[i] for i in range(len(points)-3)]
    field0 = geom.add_boundary_layer(
        edges_list=refine_lines,
        lcmin=0.01,
        lcmax=0.05,
        distmin=0.15, # distance up until which mesh size will be lcmin
        distmax=0.25, # distance starting at which mesh size will be lcmax
    )
    geom.set_background_mesh([field0], operator="Min")

    mesh = geom.generate_mesh()
    mesh.write('mesh.xdmf')