People do weird shit when they grieve, or finally get a chance to grieve.
Some go off the rails, & some just turn off and run on autopilot until time permits for them to grieve on their own terms once the crisis passes and they feel they can finally start to safely feel something.
One dude falls into a barrel of whiskey, and another communes with nature, and another goes into the insane asylum, and another just functions until it’s time to safely deal with the process on their own terms.
That fourth dude, don’t cross him until he (or she) have found that release valve, are you might become their release valve.