[HOLD for payment 2022-09-01] [$250] Whitespace on screen where keyboard used to be

[mvtglobally]

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Action Performed:

1. Open any chat
2. Press on the composer (open keyboard)
3. Put the app in the background
4. Open again with the keyboard open
5. Press back immediately
6. You should see the bottom space same as the keyboard height

Expected Result:

No white space should display

Actual Result:

Whitespace on screen where keyboard used to be

Workaround:

unknown

Platform:

Where is this issue occurring?

• iOS

Version Number: 1.1.86-0
Reproducible in staging?: Y
Reproducible in production?: Y
Email or phone of affected tester (no customers):
Logs: https://stackoverflow.com/c/expensify/questions/4856
Notes/Photos/Videos: Any additional supporting documentation

Upwork URL: https://www.upwork.com/jobs/~012bd08b740a4f2ffa
Issue reported by: @roryabraham
Slack conversation: https://expensify.slack.com/archives/C01GTK53T8Q/p1659026555000119

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[melvin-bot]

Triggered auto assignment to @luacmartins (Engineering), see https://stackoverflow.com/c/expensify/questions/4319 for more details.

[roryabraham]

Not sure if we have bulletproof reproduction steps here. We should try to nail that down a bit before making this external, imo.

[roryabraham]

I've definitely seen this happen a number of times in the wild on a physical device though

[luacmartins]

Agreed! I'll try to reproduce this some time this week

[dhairyasenjaliya]

I actually have this issue thought it was some local issue so didn't report it on slack, but it seems to be a real issue

Steps to reproduce

1. Open any chat
2. Press on the composer (open keyboard)
3. Put the app in the background
4. Open again with the keyboard open
5. Press back immediately
6. You should see the bottom space same as the keyboard height

ios_keyboard_issue.mp4

[luacmartins]

Hmm I can't reproduce this on the latest main (1.1.87-8) or staging (1.1.86-5). We reverted this PR which was causing a lot of similar issues and that was deployed in v1.1.86-2. Is this still happening on v1.1.86-2 or higher (this issue mentions 1.1.86-0)?

[dhairyasenjaliya]

@luacmartins I can reproduce in latest code 1.1.87-8

[luacmartins]

@dhairyasenjaliya I tried your steps above, while I couldn't repro on dev, I did see the behavior on a physical device on staging. The one caveat is that the white space goes away after a little bit. The events are something like:

1. Open chat and focus on the compose box (keyboard will open)
2. Navigate away from chat (keyboard closes), but whitespace remains
3. Whitespace animates away after a few seconds

So something seems to be blocking the JS thread and making the UI hang. I'll apply the external label, feel free to submit a proposal!