UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Platform: 10895.56.0 (Official Build) stable-channel tidus

Example URL:

Steps to reproduce the problem:
This MAY be a kiosk-mode-only problem.

1. Run a kiosk app on a chromebox.
2. Ping said Chromebox. See no returning pings. Request timed out. 
3. Confirm Chromebox is indeed online, on the network, functioning normally. Scratch head.
3. Traceroute DOES work.  Occasionally a solitary ping packet will get through, resetting my poor PRTG sensor, but it's generally not returning IMCP packets at all.

What is the expected behavior?
Ping should get a response. It USED to, reliably.

What went wrong?
Ping doesn't return a response.

Did this work before? Yes 68

Chrome version: 69.0.3497.95  Channel: stable
OS Version: 10.0
Flash Version: no clue without looking, don't care; Firmware version Google_Tidus.6301.109.17

This was working prior to 69, I know. This Chromebox is running the RiseVision app v2018.8.28.8208. They say nothing should have changed in their app that would break ping.