Description: When the bottom app group is being collapsed the screen scrolls up weirdly. Repro Steps: 1) Update a Flame to 20141119040205 2) Go to homescreen 3) Collapse bottom app group 4) Observe screen scroll up Actual: The screen appears jittery when scrolling up Expected: it is expected that the screen scrolls smoothly Environmental Variables: Device: Flame 2.2 (Shallow Flash)(319mb) Build ID: 20141119040205 Gaia: e64428c5b2dce5db90b75a5055077a04f4bd4819 Gecko: bc2c36dda0a9 Version: 36.0a1 (2.2) Firmware Version: v188 User Agent: Mozilla/5.0 (Mobile; rv:36.0) Gecko/36.0 Firefox/36.0 Repro frequency: 5/5 See attached: video clip(http://youtu.be/TjrfDnCiw04), logcat ---------------------------------------------------- This issue also occurs on yesterdays 2.2 Flame. Environmental Variables: Device: Flame 2.2 (Shallow Flash)(319mb) BuildID: 20141118040205 Gaia: 4aee256937afe9db2520752650685ba61ce6097d Gecko: 7913c9392c5f Version: 36.0a1 (2.2) Firmware Version: v188 User Agent: Mozilla/5.0 (Mobile; rv:36.0) Gecko/36.0 Firefox/36.0 Result: The screen appears jittery when scrolling up

Unable to check this issue in 2.1 Flame because this feature does not exist.

need info on the qa lead for nomination decision.

I have only seen this once on Flame using: Gaia aad40f6d6eb8f626c6a20db55b9f00d2e832f113 SourceStamp be4ba3d5ca9a BuildID 20141124100136 Version 36.0a1 v 188 Is there a certain sequence you are following to make this repro more consistently?

There was not a specific sequence I followed for this issue. I was seeing this every time I was on the homescreen and collapsed the bottom row so that the screen scrolled up. I was able to reproduce it every time on today’s build. I am on V188-1 Base, full flashed, with 319mb memory. Environmental Variables: Device: Flame 2.2 (319mb)(Full Flash) BuildID: 20141124100136 Gaia: aad40f6d6eb8f626c6a20db55b9f00d2e832f113 Gecko: be4ba3d5ca9a Gonk: 48835395daa6a49b281db62c50805bd6ca24077e Version: 36.0a1 (2.2) Firmware Version: v188-1 User Agent: Mozilla/5.0 (Mobile; rv:36.0) Gecko/36.0 Firefox/36.0

I think if you expand all groups scroll down until you can see the collapse bottom at the very top of the screen and then collapse the bottom group then you may see the jerkiness. The bottom group might need a lot of apps.

Although this is an older bug, duping to bug 1120884 as it has a more accurate bug title.