loading icon disappearing before background process completes for braintree payment (Admin order)

[bharanikonda]

Preconditions (*)

1. Magento 2.1.15

Steps to reproduce (*)

1. Enable Braintree payment method
2. Navigate to create order page in admin
3. Add items, Enter address, Select shipping method
4. Select braintree credit card/braintree saved card as payment method
5. Click on submit button(at the bottom of the page)

Expected result (*)

1. Loading icon must be displayed untill the page is redirected to new order view page.

Actual result (*)

1. Loading icon is disappearing before background process completes (https://www.screencast.com/t/AqqwzC0B ).
2. Since loading icon is disappeared, admin can click on another submit button(at the top). If so, multiple orders are creating.

[magento-engcom-team]

Hi @bharanikonda. Thank you for your report.
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@bharanikonda do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
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Hi @bharanikonda i'm not able to reproduce following steps your described, only 2.2.0+ bug reports are considered nowadays. Try upgrading.

[bharanikonda]

Hi,

This issue is replicating in 2.2.6 as well. Please find the below reference screencast.
https://www.screencast.com/t/x2lIGpofu

Thanks.

@bharanikonda ok. I will recheck on 2.3-develop