Thank you one more time for reporting the issue and providing diagnostics. Here is a link for previous version of Parallels Desktop https://download.parallels.com/desktop/v17/17.0.1-51482/ParallelsDesktop-17.0.1-51482.dmg
I do experience this with 18.0.3, actually since 18.0. Got the same problem as BlakeR, but it's not only via VPN, also in the office. Is there any fix for the 18.X versions?