Sessions do not match after constant_time_compare

[afidegnum]

After running the registration endpoint, I tried passing the return session to email_otp_which would call get_user_by_id function,

upon query from the database, I noticed the session_verified saved in the database is different from the one being generated returning constant_time_compare function to always be false hence returning errors.

What am I doing wrong?
Can you please assist with the correct workflow?

[afidegnum]

Also, I'm a bit confused.
why was the hex encoded 2 times?
at line: 70 and 86
I obtained differents session id from those lines.