Question Debug.isDebugBuild is false even with "development build" set to true

I'm playing around with the Boss Room demo trying to get a host and client running on the same machine. One in the editor, one in a build. But it always fails to connect due to ConnectStatus.IncompatibleBuildType.

I checked and Debug.isDebugBuild doesn't match in the build because it is still false even though I checked "Development Build" in the build settings. Is this supposed to be the case? It is definitely in developmer mode. I can see the log console and everything in the build.

I had this problem in my own project but I forgot how I resolved it.

 

I just found the same thing. "Development Build" is ticked when I build for Android, but when running on the device Debug.isDebugBuild is returning false. No, it's not meant to do that. It worked properly last time I tried.

I managed to fix it though. Before this I had switched from Full Screen to Windows, and changed the minimum dimensions to 1920x1080 as a test. I then changed back to Full Screen. It was after that that the dev build setting didn't work. I changed these things back and then it worked again. I presume it's not about these settings in particular, but just requires making some change to the platform settings in order to get it to refresh.

 

Thanks. I used precompiled directives instead:

#if DEVELOPMENT_BUILD || UNITY_EDITOR

 

Just had the same problem, Debug.isDebugBuild being false although I explicitly set BuildOptions.Development in BuildPlayerOptions.
I managed to solve the problem with what is usually the first thing I try in such weird and unexplainable cases: I deleted the Library folder of my project. It takes quite a time to rebuild, but the problem is gone, at least for now.
I've been using Unity 2021.3.10f1, but I am upgrading to 2021.3.27f1 now. Maybe the issue is gone then.

 

This works, thanks for the suggestion! So much better than having to rebuild the library!

 

The solution that worked for me is to make a clean build without need to remove the library folder

The first reason that caused this issue is I made a release build and then did a dev build after which for some reason caused this issue

You just need to click on this tiny down arrow on the Build button and choose clean build

 

I can confirm that a full "Clean build" is necessary to make this value update correctly. A normal "Build" will not update theDebug.isDebugBuild value.