Promo flicker fix by resizing lenis after Gnav loads

[bandana147]

• This is a prerequisite for integrating the promo implementation, as it resolves the promo flickering issue.

Resolves: MWPW-197493

Test URLs:

• Before: https://main--milo--adobecom.aem.page/?martech=off
• After: https://gnav-promo--milo--adobecom.aem.page/?martech=off

QA link:

• Before: https://main--upp--adobecom.aem.page/homepage/drafts/msale/2026/sr/08-03-sr-cci-ndex-loggedout?fedsbranch=gnav-promo
• After: https://main--upp--adobecom.aem.page/homepage/drafts/msale/2026/sr/08-03-sr-cci-ndex-loggedout?fedsbranch=gnav-promo&milolibs=gnav-promo

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Commits

• cfb50e6 ✅ (latest)
• 25836ec ✅
• 4fd3863 ✅

[github-actions]

Reminder to set the Ready for Stage label - to queue this to get merged to stage & production.

[prativas22]

While verifying the issue fix, observed that the flickering issue persisted.
https://main--upp--adobecom.aem.page/homepage/drafts/blaishram/redesign-demo-promo-minimized?fedsbranch=gnav-promo&milolibs=gnav-promo

flickerIssue.mp4

[DKos95]

I've observed some inconsistencies with the border-radius of the router-marquee/header when scrolling the page and reloading it, is this expected behaviour?

Screen.Recording.2026-07-16.at.13.30.51-compressed.mp4

[bandana147]

I've observed some inconsistencies with the border-radius of the router-marquee/header when scrolling the page and reloading it, is this expected behaviour?

Screen.Recording.2026-07-16.at.13.30.51-compressed.mp4

@DKos95 Please retest again. This was a separate issue for which a fix was added.

[DKos95]

@DKos95 Please retest again. This was a separate issue for which a fix was added.

Seems some cache was the issue, the issue is no longer coming up, however I did notice one more thing I would like cleared up before approving, seems that on mobile the border radius is unset sooner than on desktop, before it reaches top, is this expected?

[overmyheadandbody]

The code looks ok, but @DKos95 has a valid comment on mobile experience, which should be addressed

[bandana147]

@DKos95 Please retest again. This was a separate issue for which a fix was added.

Seems some cache was the issue, the issue is no longer coming up, however I did notice one more thing I would like cleared up before approving, seems that on mobile the border radius is unset sooner than on desktop, before it reaches top, is this expected?

We remove the border radius once Gnav has the scrolled state, added a fix to reduce the scrolled state starting earlier on mobile. Thank you for looking into this.

[Snehayt]

@bandana147 , noticing content overlap issue with promo when scrolled:

https://main--upp--adobecom.aem.page/homepage/drafts/blaishram/redesign-demo?fedsbranch=gnav-promo&milolibs=gnav-promo

https://main--upp--adobecom.aem.page/homepage/drafts/blaishram/redesign-demo-promo-maximized?fedsbranch=gnav-promo&milolibs=gnav-promo

[overmyheadandbody]

The Router Marquee block now jumps when the promo scrolling concludes

Promo.jump.mov

[Snehayt]

Validated promo with parameters : fedsbranch=gnav-promo&milolibs=gnav-promo

https://main--upp--adobecom.aem.page/homepage/drafts/blaishram/redesign-demo?fedsbranch=gnav-promo&milolibs=gnav-promo

1. Flicker issue is now resolved
2. The content overlap issue with promo when scrolled is resolved

20260720-1619-45.5241382.mp4

cc: @bandana147