Understanding Topology Change Notification on Switches
Reading this article:https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/12013-17.html#anc12
If I am getting it right TCN can also be caused by the Hosts that are connected to Access Switches, the article states that this can be avoided by configuring Portfast on interfaces to which the Hosts are connected to .
As far as I know, not all environments configure Portfast on the Interfaces where Hosts connect to, at least the environment where I work. However there is no issue reported even if there was TCN .
Any Switch Expert to shade some lights on this topic.