[TabLayout] TabLayout Scroll Bug: Left Tab Misalignment After Fast Scroll

Nobody has claimed this yet.

**Description:**

When performing a fast horizontal scroll that moves the entire TabLayout to the right, we expect the leftmost tab to return to an x = 0 position.

However, it appears that the leftmost tab occasionally snaps back to a negative x-position instead.

When this happens, tapping on any tab has no immediate effect. Instead, multiple taps are required before the leftmost tab returns to a non-negative x-position.

Until it returns to the correct position, all tab taps become unresponsive, except that they seem to gradually nudge the layout back toward alignment.

In the video, you can observe a small gap between the leftmost tab and the screen’s edge immediately after a fast scroll - this gap indicates the misalignment.

https://youtu.be/tl8PDvkRHYo

**Expected behavior:** Left most tab will never reach negative x position

**Source code:**

private void initTabs() {
if (noteFragmentStateAdapter == null) {
noteFragmentStateAdapter = new NoteFragmentStateAdapter(this, tabInfos);
viewPager.setAdapter(noteFragmentStateAdapter);

new TabLayoutMediator(tabLayout, viewPager,
(tab, position) -> tab.setText(noteFragmentStateAdapter.getPageTitle(position))
).attach();

viewPager.unregisterOnPageChangeCallback(onPageChangeListener);
viewPager.registerOnPageChangeCallback(onPageChangeListener);

// http://stackoverflow.com/questions/9857420/viewpager-fragments-getting-destroyed-over-time
viewPager.setOffscreenPageLimit(1);
} else {
noteFragmentStateAdapter.notifyDataSetChanged();
}

int selectedNoteTabIndex = WeNoteOptions.getSelectedNoteTabIndex();

setSelectedNoteTab(selectedNoteTabIndex);
}

**Minimal sample app repro:** (Sorry. I will provide a sample in next few days)

**Android API version:** Android API 35

**Material Library version:** [Material Android Library version you are using here (e.g., 1.1.0-alpha07)](com.google.android.material:material:1.12.0)

**Device:** Emulator Pixel 8 Pro API 35 arm64-v8a

https://github.com/user-attachments/assets/dfc811b2-35a6-4a52-925b-78d1d94390fa

To help us triage faster, please check to make sure you are using the [latest version](https://github.com/material-components/material-components-android/releases) of the library.

We also happily accept [pull requests](https://github.com/material-components/material-components-android/pulls).

Start at the initTabs() entry point shown in the report and reproduce the fast horizontal scroll on the Pixel 8 Pro API 35 emulator with Material 1.12.0. Confirm the leftmost tab does not reach a negative x-position and that tab taps respond immediately after the scroll.

Written by the indexing model from the issue text.