Why is buprenorphine on backorder?

Excuse me, could you please elaborate on the current situation regarding buprenorphine being on backorder? I'm curious to understand the reasons behind this phenomenon. Is it due to a shortage of raw materials, manufacturing issues, or perhaps an increase in demand? Additionally, how is this affecting patients who rely on buprenorphine for their treatment? Is there any estimated timeline for when the supply will be restored to normal levels? I would appreciate any insight you can provide on this matter.