Google Chrome v.75, Google Canary v.78 crashes when open dev tools with disabled chrome://flags "Disable site isolation"

Question

Google Chrome v.75 Google Canary v.78 chrome://flags "#site-isolation-trial-opt-out" - disabled So the problem is that browser crashes right after attempt to open developer tools with changed flag.

I tried to switch between original chrome version to canary but catch up the same problem

I expected the developer tools working with changed any of chrome://flags