Click on All scripts allowed shield setting, displays blank drop down for few seconds before loading drop down options

[GeetaSarvadnya]

Description

Click on All scripts allowed shield setting, displays blank drop down for few seconds before loading drop down options

Steps to Reproduce

1. Launch brave with clean profile
2. Open few sites ( I have opened espn.com, orimi.com, fortune.com, YT.com, twitter.com)
3. Click on shiled setting All scripts allowed

Actual result:

Click on All scripts allowed displays blank drop down for few seconds before loading drop down options.

Expected result:

Should not show blank drop down

Reproduces how often:

Always

Brave version (brave://version info)

Brave	0.58.11 Chromium: 71.0.3578.80 (Official Build) beta (64-bit)
Revision	2ac50e7249fbd55e6f517a28131605c9fb9fe897-refs/branch-heads/3578@{#860}
OS	Windows

Reproducible on current release: Yes

• Does it reproduce on brave-browser dev/beta builds? Yes

Website problems only:

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

Additional Information

@brave/legacy_qa

[LaurenWags]

Have not been able to reproduce this on macOS so far

Brave	0.58.12 Chromium: 71.0.3578.80 (Official Build) (64-bit)
Revision	2ac50e7249fbd55e6f517a28131605c9fb9fe897-refs/branch-heads/3578@{#860}
OS	Mac OS X

[srirambv]

I was able to reproduce this on beta once. But not on a new profile in beta or on release channel

[btlechowski]

Verification passed on

Brave	0.64.60 Chromium: 74.0.3729.91 (Official Build) beta (64-bit)
Revision	03844ed83e02b8add3f4b9cb859a7108d55b2e4d-refs/branch-heads/3729@{#860}
OS	Windows 10 OS Build 17134.523

Still reproducible, logged new issue #4213

Verified passed with

Brave	0.64.62 Chromium: 74.0.3729.108 (Official Build) beta(64-bit)
Revision	daaff52abef89988bf2a26091062160b1482b108-refs/branch-heads/3729@{#901}
OS	Mac OS X

• Verified test plan for this issue from several shields panel improvements brave-core#1797 (Scripts is now a fixed toggle). Did not encounter Shields Panel drop downs are blank #4213 while testing.

Verification passed on

Brave	0.64.72 Chromium: 74.0.3729.131 (Official Build) beta(64-bit)
Revision	518a41c1fa7ce1c8bb5e22346e82e42b4d76a96f-refs/branch-heads/3729@{#954}
OS	Linux

• Encountered Shields Panel drop downs are blank #4213 on both dark and light theme on LInux