Crash due to some cookie timeout?

[tunnell]

The node app crashed (so whole website) today with this error. I'm putting it here just to log it in case it happens again.

GET /shifts/get_shifts?start=2021-08-01&end=2021-09-12&timezone=UTC&_=1625487524497 200 1.117 ms - 2932
assert.js:669
assert.ifError = function ifError(err) { if (err) throw err; };
                                                  ^
Error: Error setting LBUwBUDLGJx8yHG5T5KJjKAtheEEbqIb to Session {
  cookie:
   { path: '/',
     _expires: 2021-07-12T12:48:22.773Z,
     originalMaxAge: 604800000,
     httpOnly: true },
  returnTo: '/' }: getaddrinfo EAI_AGAIN cluster0-shard-00-01-dumoh.gcp.mongodb.net:27017
    at /home/martinez/xenon-users-web/node_modules/connect-mongodb-session/index.js:229:21
    at Object.topology.selectServer.err [as callback] (/home/martinez/xenon-users-web/node_modules/mongodb/lib/operations/execute_operation.js:176:7)
    at Timeout.waitQueueMember.timer.setTimeout [as _onTimeout] (/home/martinez/xenon-users-web/node_modules/mongodb/lib/core/sdam/topology.js:435:25)
    at ontimeout (timers.js:482:11)
    at tryOnTimeout (timers.js:317:5)
    at Timer.listOnTimeout (timers.js:277:5)