Unexpected closing of counters in beta, Beta, delta, omicron, sigma, rho, alpha

unexpected closing of counters in beta Beta delta omicron sigma rho alpha

Design Space WGHT400, WDTH 25, opsz144, GRAD 150

And slnt -10

Also beta persists having issues through 800 wdth whereas the other do not.
Letter delta also stays distorted from 400-800 with the join from the lower round to the ascender not being smooth

in contrast to this smooth shape

delta also has issues in this part of the design space

Start by reproducing the beta, Beta, delta, omicron, sigma, rho, and alpha shapes across the reported Design Space settings: WGHT 400, WDTH 25, opsz 144, GRAD 150, and slnt -10. Compare the attached examples, including beta through WDTH 800 and delta from 400–800, and verify that counters close and joins remain smooth.

Written by the indexing model from the issue text.