Describe the bug
ZT on Linux claims to be online, and other planets and leaves are visible. However, trying to connect to a leaf using its ZT-assigned address fails ("no route to host").

A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Install ZT on laptop running Fedora 32 and Synology NAS (both on the same home network).
2. Create a simple ZT network with default rules.
3. On a fresh boot of the laptop, run "sudo zerotier-cli status" and "sudo zerotier-cli listpeers". Observe that the status command returns "ONLINE" and that there are peers listed.
4. Try to connect to the NAS using its ZT-assigned address. Error ("no route to host") occurs.

Expected behavior
The laptop connects to the NAS through its ZT-assigned address.

Laptop (please complete the following information):
ZT version 1.4.6 on Fedora 32 (x64 laptop)

NAS
Synology x64 NAS

Additional context
Forcing the zerotier-one service to restart typically fixes the problem (although unlike #1214 I have not had to wait several minutes before restarting).