Factors affecting supply.
1). Chinese fab factories that are on the US entity list. US manufacturers who used to buy from them are forced to move to other places and this causes supply issues.
2). Chinese customers who are anxious about getting blocked from purchasing US components are building up inventory.
3). COVID concerns are causing rolling outages in supply.
4). Current fab manufacturing capacity running at 100%+.
5). The temporary weather disruption in Texas where Texas Instruments and other companies manufacture semiconductors did not help.
6). The semiconductor supply chain for automobiles is almost empty.
7). Changes in consumer behaviour due to COVID-19. People were not able to spend money on restaurants, travel or vacations. They used that money to upgrade their home office and entertainment electronics.
Many A3 copier manufacturers are located in China. Presumably they can still purchase semiconductor chips manufactured in China.