Long Delay and Duplicate Events After Updating Existing Event

When using saveEvent to update a single existing event on Android Tablets, the updated event is duplicated for a while: it’s visible on its new date and time, and also still shows up under the old date and time for approximately 2 minutes or longer.

Also, slightly different but may be related, on the Android Pixel 2, the updated event is not showing twice, but is taking up to 2 minutes to reflect in the calendar.

Environment

Tablets: Android Samsung Galaxy Tab A (Android 10), and Nexus 9 (Android 7.1.1) Phone: Pixel 2 (Android 11)

System: OS: macOS 10.15.7 CPU: (16) x64 Intel® Core™ i9-9880H CPU @ 2.30GHz Memory: 27.94 MB / 16.00 GB Shell: 5.7.1 - /bin/zsh Binaries: Node: 14.15.0 - ~/.nvm/versions/node/v14.15.0/bin/node npm: 6.14.8 - ~/.nvm/versions/node/v14.15.0/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman SDKs: iOS SDK: Platforms: iOS 14.4, DriverKit 20.2, macOS 11.1, tvOS 14.3, watchOS 7.2 Android SDK: API Levels: 28, 29, 30 Build Tools: 28.0.3, 29.0.2, 30.0.2 System Images: android-30 | Google APIs Intel x86 Atom IDEs: Android Studio: 4.1 AI-201.8743.12.41.6953283 Xcode: 12.4/12D4e - /usr/bin/xcodebuild npmPackages: react: 16.9.0 => 16.9.0 react-native: 0.61.5 => 0.61.5 npmGlobalPackages: react-native-cli: 2.0.1

Steps to Reproduce

await RNCalendarEvents.saveEvent( eventName, // "Module 1 Flashcards" (assignment due) { id: existingEventId, // "924" startDate: eventDate.toISOString(), // Fri May 07 2021 15:10:00 GMT-0400 (Eastern Daylight Time) endDate: eventDate.toISOString(), // Note: we use this as a due date/time, so start and end times are equal calendarId: primaryCalendarId, // "1" notes: eventNote, // "some text" description: eventDetails // "some text" } );

Expected Behavior

Expected the event datetime to reflect in the calendar immediately, and for the updated event to no longer appear on its previous datetime.

Actual Behavior

On Tablets, the event is showing twice for 2 minutes or longer, one on the updated datetime, another on the previous datetime. (New circled in blue, old circled in red)

[MoOx]

This was undocumented. I added more info in the readme about this in 69ec2a5c055244f16ceb467edb0a76471face239

[PAronofsky]

Yeah, I meant in typescript, I put in a small PR above