What are the top 3 causes of supply chain disruptions?

Are supply chain bottlenecks completely to blame for recent inflationary pressures?

When do you predict that the situation will end and things will be "back to normal"

use these sources for information:

https://www.nytimes.com/2021/10/22/business/shortages-supply-chain.html?unlocked_article_code=AAAAAAAAAAAAAAAACEIPuonUktbfqohlSFUZASbfQMMmqBCdnr_UwLsmmnbxITPQUita1-AERoOA8kbLI6p_Yt95lxKqeOh8Cp59Dvpj0r0YeEV3VwijppbDwJkMKno8-d_2AmlohNeQBOtitG6yZDX8cLchlOTn4hneOWi-S7WfhSN6XHttqZpndFCg23UalOySQqMuhI4Ijbp2DYt6RDwDeCGIo_Lsbh16M9mGZRrZgRIkD6AbAXqA2I7BtM9TNVlaGlnET3tg4W4j6dM6ONwfOK33LB9Ia9NVxAJNWiSMCUUsir-_OwbM&smid=url-share

https://www.npr.org/2021/10/20/1047777081/keep-calm-its-just-the-bullwhip-effect

https://sloanreview.mit.edu/article/what-everyone-gets-wrong-about-the-never-ending-covid-19-supply-chain-crisis/