[SeatMap/selection seats] Chosen cell immediately disappears after tapping on it

**Steps to repro:**
1. Open Chrome browser on Android mobile device;
2. Open test link: https://amp.dev/documentation/examples/interactivity-dynamic-content/seatmap/preview/
3. Try tapping on white cells;
4. See the behavior

**Actual Result**: chosen cell immediately disappears after checking it

**Expected Result**: cell should be selected by tapping

Video: https://photos.app.goo.gl/7m1D1Dth8YRTWrZ67

Testing environment:
Chrome Version 101.0.4951.41 (mobile)
Pixel 3a XL

Start by reproducing the issue in the AMP seatmap preview linked in the report using Chrome on Android, then trace the seat selection behavior in the corresponding seatmap example. Compare tapping white cells with the expected selected state and verify that the chosen cell remains visible after the change.

Written by the indexing model from the issue text.