TS connection repreatly lost in Win7 VM

I’m running a Windows 7 Pro SP1 VM in VMware Workstation 17.0.1. The VM has a NAT interface and I’ve installed Tailscale 1.40.1 (TS). Everything works for awhile (e.g. I can connect via RDP over Tailscale), but eventually the connection drops and the TS system tray application logs out. Attempting to login via system tray app fails, but exiting and restarting TS works.

Any ideas why the TS app is disconnecting?