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Host Networking Issue

We are running into an issue where a docker host is not able to open connections to any resource on the LAN or WAN except ping it continues to work. For example, the host times out trying to download an updated image from Docker Hub. Then what seems to randomly connectivity returns. The other interesting thing is the containers running on the host can still communicate with the LAN and WAN. Recycling the Docker Service seems to resolve the issue.

We are running Windows 2019 Docker Hosts (latest updates). We are running Swarm as the orchestrator and have about 32 stacks (wanting to expand to more).

Client: Docker Engine - Enterprise
Version: 19.03.1
API version: 1.40
Go version: go1.12.5
Git commit: f660560464
Built: 07/25/2019 20:59:52
OS/Arch: windows/amd64
Experimental: false

Server: Docker Engine - Enterprise
Engine:
Version: 19.03.1
API version: 1.40 (minimum version 1.24)
Go version: go1.12.5
Git commit: f660560464
Built: 07/25/2019 20:57:41
OS/Arch: windows/amd64
Experimental: false

QQ:
Do you use just host names or FQN?
In our environment, cannot ping external resource (from within container) by host name but can by FQN…