Asanga, the founder of Yogachara Buddhism, is a highly revered figure in the Buddhist community. His teachings and contributions have greatly influenced the development of Mahayana Buddhism. However, like many other prominent figures in history, Asanga's teachings have also been subject to controversies and debates.

One of the main controversies surrounding Asanga's teachings is the concept of "mind-only" or "consciousness-only" (vijnaptimatra) in Yogachara Buddhism. This concept suggests that all phenomena, including external objects, are ultimately projections of the mind and have no inherent existence. This idea has been heavily debated by other Buddhist schools, particularly the Madhyamaka school, which argues that external objects do have some level of inherent existence.

Another controversial aspect of Asanga's teachings is the concept of the "storehouse consciousness" (alaya-vijnana). This is the idea that there is a fundamental consciousness that stores all the impressions and experiences of an individual, which then manifest as future thoughts and actions. This concept has been criticized by some as being too deterministic and not allowing for free will.

Furthermore, there have been debates about the authenticity of some of Asanga's works, particularly the Mahayanasamgraha. Some scholars argue that this text may have been written by multiple authors and not solely by Asanga himself.

In addition to these controversies, there have also been debates about the role of meditation in Yogachara Buddhism. Asanga emphasized the importance of meditation as a means to achieve insight and understanding, but some critics argue that this focus on meditation may have led to a neglect of other important aspects of Buddhist practice, such as ethical conduct and wisdom.

Despite these controversies and debates, Asanga's teachings continue to be highly influential in the development of Mahayana Buddhism. His emphasis on compassion, wisdom, and meditation has inspired many practitioners and continues to be a central aspect of Yogachara Buddhism.

In conclusion, while there may be some controversies and debates surrounding Asanga's teachings, his contributions to Buddhism cannot be denied. His teachings have greatly shaped the development of Mahayana Buddhism and continue to be studied and practiced by many to this day.