Time picker does not save values properly and adds a timezone while list-editing.
Steps to Reproduce
Activate List v3.
For more information, see the product documentation topic Activate List v3.
Navigate to any list, for example, incident.list.
Choose Configure > List Layout.
Add a custom GlideTime field to layout and Save.
Double-click to list-edit the newly created cell.
Save the value without changing the time.
See that a timezone has been applied to the time.
Disable List v3 or remove the field from the list layout.
Both options will force the user to modify/update the GlideTime field from form view, in which the issue does not occur.
Related Problem: PRB1273165