Why are SLA values displayed in a different Time Zone when I move an activity back the Bucket's non-scheduled pool?

Environment

Oracle Field Service (OFS)

Issue

When I move an activity assigned to a certain Field Resource to the Bucket's non-scheduled pool, OFS displays SLA (Start and End) values in a different Time Zone.

Resolution

For non-scheduled activities with option 'SLA and Service window use customer time zone (required for routing)' selected in Configuration > Activity Types, OFS will calculate activity's Time Zone based on the customer's Time Zone. Reason is that it is actually unknown what would be the Resource's Time Zone that will get assigned to the activity.

Example:

1 - Create a non-scheduled activity in a Bucket that has a different Time Zone from destination's Field Resource you intend to assign the activity to.

2- Place the activity in the Field Resource's route. 

Observe that OFS will take in consideration Field Resource's Time Zone and display activity's SLA values accordingly.

3 - Move the activity from the Field Resource back to the Bucket's non-scheduled pool. 

Observe that OFS will display SLA values based on customer original Time Zone: