I am developing an Spartacus TUA Application and currently I am facing some issue
When Spartacus is performing addCartEntryWithChecklistActions standard function, the current user is set at context.
But when calling the msisdnReservationService, Spartacus looses the reference to the current user.
At first image you can look that the current user is set to tim.james@hybris
And at second print the current user is null
Talking with Spartacus DEV Team via SAP Incidents and found out that is seems to be a OOTB Bug.
So we made an override at this point and now it is working