Flutter hot reload not working for 1.6.0-nullsafety.0 (iOS)

1.6.0-nullsafety.0 seems to break hot reload.

Observed this in my project, and then confirmed that it is an issue with a clean project.

Hot reload stops working when initialize is called:

FlutterDownloader.initialize();

To replicate:

• run any application with flutter downloader configured (null safety enabled with version 1.6.0-nullsafety.0)
• ensure initialize is called
• change any field or widget that will cause a visual change on screen (save file)
• then perform a hot reload.

At which point hot reloading gets stuck, and a force quit is required.

Example CLI output:

[        ] reloaded 1 of 1852 libraries
[  +59 ms] Reassembling application
[+2008 ms] This is taking a long time; will now check for paused isolates.
[  +90 ms] Found 0 newly paused isolate(s).
[+11217 ms] Ignoring terminal input: "q" because we are busy.

This could likely be a environment issue, but I tested different Flutter versions and on a simulator and physical device.

NOTE: Did not test Android.

[rodineijf]

I’ve experienced the same issue. Removing the FlutterDownloader.initialize() makes the hot reload work again.

[alhafoudh]

Same issue in 1.6.0 and 1.6.1 version. Tested on iOS simulator and real device. Android works fine.