[Bug]: duplicate label in sp-progress-bar

[sdiverdi]

Code of conduct

• I agree to follow this project's code of conduct.

Impacted component(s)

sp-progress-bar, sp-field-label

Expected behavior

An sp-progress-bar that is initially created with an undefined label, and later has a label defined, should display the label the same as if it were initially created with that label.

Actual behavior

An sp-progress-bar that is initially created with an undefined label and later has a label added will display the label twice.

Screenshots

Initial state (first progress bar has undefined label):

Error state, after a new label has been provided for both progress bars, first progress bar has duplicate label:

What browsers are you seeing the problem in?

Chrome

How can we reproduce this issue?

1. Go to https://codepen.io/sdiverdi/pen/XWQaVog
2. Click the "change label" button
3. See the first progress bar has a duplicated label

Sample code that illustrates the problem

https://codepen.io/sdiverdi/pen/XWQaVog

Logs taken while reproducing problem

No response