The preload example model doesn't load on user interaction unless the interaction is first a tap.

[dbbrooks-lgtm]

Description

Devices with repro: Samsung S8+, Pixel 4 XL

Go to https://modelviewer.dev/examples/loading/#preload swipe back and forth on the model to interact with it. The model does not load unless a single click / tap is performed first. It's a bit counterintuitive since a tap is not required to interact with models on other examples.

Screen recording:

https://user-images.githubusercontent.com/77503048/104784784-e023db80-573d-11eb-99e2-5d08e9036a5f.mp4

Version

• model-viewer: v1.4

Browser Affected

• [x] Chrome, version 87.0.4280.141
• [ ] Edge
• [ ] Firefox
• [ ] IE
• [ ] Safari

OS

• [x] Android P (9), Android S (12)
• [ ] iOS
• [ ] Linux
• [ ] MacOS
• [ ] Windows

[elalish]

Interaction should be more broad than just a tap, in order to include things like swipes as well.