Answer

Quite a lot is known about the structure of the fall from the 11th guṇasthāna, but very little is described in a narrative or psychological way. In the doctrinal literature, the 11th stage is upaśānta-moha: delusion is only suppressed, not destroyed. Because of that, the state is temporary, and Jain writers say the soul can relapse after a very short stay. The scheme is presented as logical rather than chronological, and the texts themselves allow for relapses. ( jainqq.org)

Explanation

The main point found across Jain writings is this: the 11th guṇasthāna belongs to the upaśama-śreṇi. Since the passions are pacified rather than annihilated, the soul may fall back when those karmas rise again. One standard explanation says that after a short stay in the 11th stage, the soul must come down to a lower stage; another says that the soul at this stage is quite likely to descend because the karmas are only subsided, not destroyed. ( wisdomlib.org)

What is less uniform is the exact landing stage. Some expository Jain works say the soul may fall to the 7th guṇasthāna; others say it may fall to the 6th or 7th, and some popular summaries simplify the relapse as going as low as the 2nd or even the 1st stage. These differences show that the texts are describing the same doctrinal truth in different levels of detail, not telling one fixed historical story. ( jainqq.org)

Spiritual Understanding

Spiritually, the 11th stage teaches an important Jain lesson: suppression is not the same as destruction. The soul can taste high purity, but if delusion is only kept quiet and not fully uprooted, the achievement remains unstable. This is why Jain texts contrast the 11th stage with the 12th guṇasthāna, kṣīṇa-moha, where delusion is destroyed and the path becomes secure. ( jainqq.org)

Takeaway

So, the short answer is: we know the doctrinal principle very well, but not a single uniform “fall story.” The 11th guṇasthāna is temporary, relapse is expected in the upaśama-śreṇi, and different Jain writings describe the regression with slightly different levels of specificity. ( jainqq.org)