Backspacing after searching for non-existent feed source seems to "hang" search

[stephendonner]

Description

Backspacing after searching for non-existent feed source seems to "hang" search

Steps to Reproduce

1. install 1.47.20
2. launch Brave
3. open brave://flags
4. set brave://flags/#brave-news-v2 to Enabled
5. open a new-tab page
6. click on Customize
7. click on Brave News
8. click on Turn on Brave News
9. type https://brave.com
10. click on the Get feeds from https://brave.com
11. now, backspace/delete the m
12. wait...

Actual result:

step 9	step 10	step 11

Expected result:

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.47.20 Chromium: 107.0.5304.68 (Official Build) nightly (x86_64)
Revision	a4e93e89d3b3df1be22214603fba846ad0183ca5-refs/branch-heads/5304@{#991}
OS	macOS Version 11.7.1 (Build 20G918)

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

cc @fallaciousreasoning @mattmcalister

[fallaciousreasoning]

Was this fixed by brave/brave-core#15611 or is it still happening? Just having a play around to try and repro and I'm not having too much success

[stephendonner]

Was this fixed by brave/brave-core#15611 or is it still happening? Just having a play around to try and repro and I'm not having too much success

Can still easily reproduce this 100% using

Brave	1.47.33 Chromium: 107.0.5304.91 (Official Build) nightly (x86_64)
Revision	3d5948960d62418160796d5831a4d2d7d6c90fa8-refs/branch-heads/5304@{#1097}
OS	macOS Version 11.7.1 (Build 20G918)

[fallaciousreasoning]

Okay cool, I'll dig into it a bit more

[mattmcalister]

Reducing priority on this. Yes, it's odd behavior, but it's very minor. Not closing it yet but not prioritizing it atm.

[fallaciousreasoning]

Does this still repro in latest Nightly? I had a quick go in 1.55.5 Chromium: 115.0.5790.32 (Official Build) nightly (64-bit) (Linux) and it seemed to be fine.

Scratch that, I was holding it wrong 😆

[stephendonner]

Verified PASSED using

Brave	1.58.78 Chromium: 116.0.5845.51 (Official Build) nightly (x86_64)
Revision	ca260d8
OS	macOS Version 11.7.9 (Build 20G1426)

Used my steps to reproduce from #26308 (comment).

Confirmed pressing delete / backspace doesn't "hang" the search UI, and it updates dynamically