NTP unpackMetadata crash.

[iccub]

Description:

Steps to Reproduce

1. Hard to reproduce, it crashes for some users only

Actual result:
Crash

Expected result:

Reproduces how often: [Easily reproduced, Intermittent Issue]

Brave Version:

Device details:

Website problems only:

• did you check with Brave Shields down?
• did you check in Safari/Firefox (WkWebView-based browsers)?

Additional Information

[kjozwiak]

@jhreis @iccub if this is hard to reproduce and there's no STR, I'm going to label this as QA/No as there's not much we can do in this instance. Unless there's some STR that QA can go through.