Grant claim doesn't always work on first try from panel notification

[srirambv]

Description:

Grant claim doesn't always work on first try from panel notification

Steps to Reproduce

1. Install 1.15(20.02.12.10)
2. Switch to Dev/Staging rewards
3. Open BR panel and wait for grant to show up
4. Try to claim the grant, doesn't always get claimed on first try
5. Close and reopen panel and claim works fine

Note: Claiming grant from rewards setting page works on first try itself

Actual result:

Expected result:
Should work on first attempt

Reproduces how often: [Easily reproduced, Intermittent Issue]
Easy

Brave Version:
1.15(20.02.12.10)

Device details:
All

Website problems only:

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

Additional Information

[srirambv]

Verification passed on iPhone 7+ with iOS 13.3.1 running 1.15.1(20.03.31.15)

• Verified able to claim grant on the first try

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Verification passed on iPhone XR with iOS 13.4 running 1.15.1(20.03.31.15)

• Verified able to claim grant on the first try

---

Verification passed on iPhone 6 with iOS 12.4.5 running 1.15.1(20.03.31.15)

• Verified able to claim grant on the first try

---

Verification passed on iPad Pro with iOS 13.3.1 running 1.15.1(20.03.31.15)

• Verified able to claim grant on the first try

---

Verification passed on iPad Pro with iOS 12.4.5 running 1.15.1(20.03.31.15)

• Verified able to claim grant on the first try