When I enter a tagline in the site creation flow, I expect it to be set on the site.
The tagline I entered isn't saved or displayed on my site.
Result: The tagline is not saved or displayed.
Tested with WP Internal 12.0.0.20190311 on iPhone 6S iOS 12.1.4 and confirmed the tagline set during site creation is still not saved. (1m27s)

This comment from the corresponding Android defect suggests this might be a server-side issue. If so, it would account for the occurrence on both platforms.
@designsimply A discussion about this topic is underway via p1552602073005000-slack-bt-site-creation, and someone has been assigned. If confirmed as a server-side issue, it should not require a client-side fix. Otherwise, a change will need to be expedited.
cc: @malinajirka @oguzkocer @ctarda @kwonye
As for the behavior, I have double-checked the request sent in production (11.9), and can confirm that the tagline is being sent, as noted in the following payload.
{
"validate": false,
"options": {
"site_vertical": "p23",
"site_segment": 2,
"site_information": {
"site_tagline": "test"
}
},
"public": 1,
"blog_title": "11151a",
"client_id": "11",
"client_secret": REDACTED,
"blog_name": "11151a",
"lang_id": "1"
}
For reference, it was tested before the services were in place based on the contract (p9wMUP-bH-p2):
And after : #10712
This was fixed in D25611-code.
Confirmed - thank you!
Most helpful comment
This was fixed in D25611-code.