OnSubmitEditing fires at wrong time on TextInput

[ospfranco]

Environment

System:
OS: macOS 10.15.5
CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
Memory: 2.21 GB / 32.00 GB
Shell: 5.7.1 - /bin/zsh
Binaries:
Node: 14.2.0 - /usr/local/bin/node
Yarn: 1.22.0 - ~/.volta/bin/yarn
npm: 6.14.4 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.9.1 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 13.5, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
Android SDK:
API Levels: 27, 28, 29
Build Tools: 27.0.3, 28.0.3, 29.0.0
System Images: android-28 | Google Play Intel x86 Atom, android-R | Google APIs Intel x86 Atom
Android NDK: Not Found
IDEs:
Android Studio: 3.4 AI-183.6156.11.34.5522156
Xcode: 11.5/11E608c - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_212 - /usr/bin/javac
Python: 2.7.16 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.11.0 => 16.11.0
react-native: 0.62.2 => 0.62.2
npmGlobalPackages:
react-native: Not Found

Issue

When using TextInput field onSubmitEditing is being fired when pressing the backspace key

Steps to Reproduce

1. Create the following component:

<TextInput
        placeholder="+ Add Entry..."
        onSubmitEditing={() => console.warn('onSubmitEditing fired')}
        multiline
        numberOfLines={10}
/>

2. Start typing, when you press Cmd+Enter the onSubmitEditing function is called correctly
3. Now press Delete key
4. onSubmitEditing will also fire

Expected Behavior

expected onSubmitEditing to only fire when pressing the Enter key

[okwast]

Hey, I also experience some issues with the TextInput.
When multiline is false it seems like onSubmitEditing is not called at all. At least I did not make it happen.
Neither with Enter nor CMD+Enter nor anything else.

With multiline enabled the TextInput seems to be completely broken.
It stops showing the input, but only shows the background and when typing there is some block spawning at the bottom of the window.
A bit hard to explain.

With empty input:

After typing asdf:

System info:

System:
OS: macOS 10.15.4
CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Memory: 186.52 MB / 16.00 GB
Shell: 3.0.2 - /usr/local/bin/fish
Binaries:
Node: 14.1.0 - /usr/local/bin/node
Yarn: 1.22.4 - /usr/local/bin/yarn
npm: 6.14.4 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.8.4 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 13.5, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
Android SDK:
API Levels: 28, 29
Build Tools: 28.0.3, 29.0.2
System Images: android-28 | Intel x86 Atom, android-28 | Google APIs Intel x86 Atom, android-28 | Google Play Intel x86 Atom
Android NDK: Not Found
IDEs:
Android Studio: 3.6 AI-192.7142.36.36.6392135
Xcode: 11.5/11E608c - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_232 - /usr/bin/javac
Python: 2.7.16 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.11.0 => 16.11.0
react-native: 0.62.2 => 0.62.2
npmGlobalPackages:
react-native: Not Found

[tom-un]

Probably related to Issue #432
@tido64 FYI

[tido64]

@okwast Can you create a new issue for us? Thanks!