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Data in multi page not loading in Heroku

data comes from a web API. different ID used to make the call, will return data from different tables

the idea is to make the call using multi page through the pathname in dcc.Location.

once the data comes in, it will be saved in this session through a hidden Div.
a dcc.Interval is used to “push” parts of this data, populating the dropdown menu for user’s selection and html tables for display.

the application works fine locally, but the data does not seem to be able to populate my various components once deployed to Heroku.

appreciate if can shed some light on this issue. thanks.