the new challenge system doesnt work the way it should

Description:
so what happens is once you complete a challenge it never appears in the challenge thing again no matter how you do it and challenges are different of each server and I have just been getting the same challenges which are either the: own 1 gym, catch flying types, breed a pokemon and get a pokemon to 100% ev trained

When it happened (date/time):
ever since the new challenge system got recently updated

Location (server number):
all servers since the challenges are different on each server

Screenshot/Video proof (if required):