Difficult to grab zoomed in book when located at top of window

[Nancy-Salpepi]

Test device MacBook Air (m1 chip)

Operating System 12.3

Browser Safari/Chrome

Problem description For https://github.com/phetsims/qa/issues/791 After atoms have been rubbed off, it can be difficult to grab the zoomed in book when it is at the top of the window. When interactive highlights are on, I can see that grabbing the space will result in me grabbing the book. When they are off, it is my instinct to grab the atoms and I can't. In the published version, I am able to grab the atoms.

Steps to reproduce

1. Move zoomed in book to rub off all the atoms.
2. Move zoomed in book to top of window and release.
3. Try to grab zoomed in book.

Visuals Dev version:

https://user-images.githubusercontent.com/87318828/161065663-35c87bca-7f96-4c8e-8f8f-f04ee064ea78.mp4

Published version:

https://user-images.githubusercontent.com/87318828/161065772-2f86f0b0-200e-4b85-8776-fc5cdf0934b9.mp4

Troubleshooting information: !!!!! DO NOT EDIT !!!!! Name: ‪Friction‬ URL: https://phet-dev.colorado.edu/html/friction/1.6.0-dev.24/phet/friction_all_phet.html Version: 1.6.0-dev.24 2022-03-30 15:06:07 UTC Features missing: applicationcache, applicationcache, touch Flags: pixelRatioScaling User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36 Language: en-US Window: 1431x690 Pixel Ratio: 2/1 WebGL: WebGL 1.0 (OpenGL ES 2.0 Chromium) GLSL: WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium) Vendor: WebKit (WebKit WebGL) Vertex: attribs: 16 varying: 31 uniform: 1024 Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 32) Max viewport: 16384x16384 OES_texture_float: true Dependencies JSON: {}

[KatieWoe]

I noticed that, in the dev test, the bubbles in the row attached to the book are not grabbable. This is not the case for the published sim, which seems to worsen the problem now compared to previous versions.

Edit: I even had this cause a bit of difficulty when no orbs were lost when that was the area of the book I just so happened to try to grab.

[zepumph]

Very helpful bug report. The regression was in the little bumps on the background blue. Should be fixed, please confirm and feel free to close.

[Nancy-Salpepi]

Looks good! Closing.