SDK 8.4.0 – Launcher Icon Resource Error Despite Valid Setup

Hi Garmin team and fellow developers,

I'm encountering a persistent issue when building a Connect IQ watch-app using SDK 8.4.0. The build fails with:

ERROR: A bitmap resource matching the provided launcher icon can't be found.
You must provide a bitmap resource for the launcher icon.

Setup:

• manifest.xml:

<iq:application
  id="sleep.logger"
  name="@Strings.AppName"
  type="watch-app"
  entry="SleepLoggerApp"
  launcherIcon="@Drawables.AppIcon">

• drawables.xml
  :

<drawables>
  <bitmap id="AppIcon" filename="AppIcon.png"/>
</drawables>

• • File:
  resources/Drawables/AppIcon.png
  (48×48 PNG, verified)

I’ve checked:

• File path and case sensitivity
• PNG format (24-bit RGB)
• XML encoding (UTF-8 without BOM)
• Tried placing the icon in resources-venu3s/Drawables and duplicating drawables.xml there
• Tried SDK 8.3.x — different error, still fails

Still getting the same error. Is this a known issue with SDK 8.4.0? Any workaround or fix?

Thanks in advance,
Dmytro