Confirmed! I am able to reproduce the warning when running
npm run build:
export 'default' (imported as 'glamorDefault') was not found in 'glamor' (possible exports ...)
This is unfortunate because it is chatty in your build logs. It should not cause a problem at runtime, however.
The short-term guidance for this warning is to try to ignore it for the next couple months. This is because glamor is being removed from the Design System over the next couple months.