Chromium Version 78.0.3904.70 (Official Build) snap (64-bit) on Ubuntu 19.10, Intel® Core™ i7-8550U CPU @ 1.80GHz × 8, GeForce GTX 1050/PCIe/SSE2. Since my upgrade to 19.10, snap chromium will not connect when VPN is enabled. Chromium does connect when VPN is disabled. Access NetworkManager service is enabled in chromium snap.
Can you please file a bug for this issue by running the following command in a terminal?
See this other thread: Snap Apps no work with VPN?.