I am still experiencing an issue where the icon (not the shortcut itself) is lost on the shortcut pinned on the task bar when upgrading PowerShell 7 preview versions. (side note, 6.2.3 still lost the entire shortcut when upgrading from 6.2.2) I just upgraded from preview 3 to preview 4.

Windows 10, Insiders build (currently 18980).

Reference #8918, #6088