Source: The Great Interpretation of Dreams (Ibn Sirin)
Cutting or shaving hair before exiting Ihram indicates not completing the rituals or committing a prohibition.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
It indicates opposing the Sunnah or non-acceptance of deeds.
Source: Signs in the Science of Expressions (Ibn Shaheen)
It is interpreted as worry and negligence in worship.