In Jainism, "upsarg" refers to obstacles, troubles, or hardships caused—often by others—towards ascetics or enlightened beings, especially Tirthankaras and revered monks. Such stories are common in Jain literature to illustrate the steadfastness, forgiveness, and spiritual strength of great souls.

Muni Kulbhushan and Muni Deshbhushan are celebrated for their scholarship and spiritual achievements in recent Jain history, especially among the Digambara sect. Both were prominent Jain monks of the 20th century and contributed immensely to the propagation of Jain teachings.

However, there is no widely known or traditional upsarg story specifically involving Muni Kulbhushan or Muni Deshbhushan found in canonical Jain scriptures or popular legends, unlike the famous upsarg stories of Tirthankaras (such as Lord Parshvanath facing Kamath’s upsarg).

If you are referring to any particular event or modern anecdote where these monks faced challenges or hardships ("upsarg") during their spiritual work, it may be a contemporary occurrence or a local tradition, but it is not a classical Jain upsarg story as found in the ancient Jain texts.

If you want to know about the general concept of upsarg, or about the life and contributions of Muni Kulbhushan or Muni Deshbhushan, or about well-known upsarg stories in Jainism, please specify your request.