Yes the Idol of Krishna Ji is there infront of her BUT it is the Divine Light she is attracted too...the formless of 'him'...
Below are a few links explaining her Divine Love for Krishna Ji-not his Idol:
In Advaita Vedanta, Brahman is without attributes and impersonal. It can be best described as infinite Being, infinite Consciousness, and infinite Bliss.Since it is beyond human comprehension, it is without any attributes, for assigning attributes to it would be distorting the true nature of Brahman. Advaitins believe in the existence of both Saguna Brahman and Nirguna Brahman, however they consider Nirguna Brahman to be the Absolute Truth seen without the influence of mind.
When man tries to know the attributeless Brahman with his mind, under the influence of an illusionary power of Brahman called Maya, Brahman becomes God (Ishvara). Personal God(i.e Isvara here) is the reflection of the Brahman in the environment of illusion caused by mind (Maya). Just like reflection of moon, in a pool of water.
This Brahman, is not limited by any mental conception or duality, whether personal or impersonal, existent or nonexistent, formless or manifested in form, timeless or extended in time, spaceless or extended in space. It is simultaneously all of these but is bound by none of them. It is at once the universe, each individual being and thing in the universe, and the Transcendent beyond the universe.
A follower of Advaita Vedanta would have no problems accept the Islamic concept of Allah or the Buddhist Void.Guru Nanak's Sikhism is a movement based on Advaita Vedanta.
The Supreme as formless in absolute terms version applies to majority of Shaivite Schools(which worship Shiva).
But Vaishnava Schools differs.They are not completely non-dualistic.Some of them are completely dualistic like the orthodox abrahamic religions.The concept of avatar like Krishna is central to Vaishnavism.
In Visishtadvaita(Qualified non-duality) and Dvaita (which are vaishnava philosophies), , Ishvara (the Supreme Controller) has infinite attributes and the source of the impersonal Brahman.All Vaishnava schools are panentheistic and perceive the Advaita concept of identification of Atman with the impersonal Brahman as an intermediate step of self-realization, but not Mukti, or final liberation of complete God-realization through Bhakti Yoga.
Their goal is ParaBrahman and It is believed that all Vaishnava and other schools attribute Personhood(form) to this concept.
Hope,this might be helpful for you.