Docker deployment not starting after upgrade from 4.2.0 to 4.2.1/4.2.2/4.3.0

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Tried running the container with bash as entrypoint (now testing on 4.3.0).
The environment variables within look fine to me:

I have no name!@rocket_test:/app/bundle$ printenv
HOSTNAME=rocket_test
PWD=/app/bundle
PORT=3000
NODE_ENV=production
Accounts_AvatarStorePath=/app/uploads
DEPLOY_METHOD=docker-official
RC_VERSION=4.3.0
HOME=/tmp
TERM=xterm
SHLVL=1
ROOT_URL=https://my.domain.here
MONGO_OPLOG_URL=mongodb://rocket:password_censored@mongo-db:27017/local?authSource=meteor&replSet=rs0
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MONGO_URL=mongodb://rocket:password_censored@mongo-db:27017/meteor
NODE_VERSION=12.22.8
USE_NATIVE_OPLOG=true
_=/usr/bin/printenv

Running the app manually also dies after a silent while. There is an error, but not too verbose:

I have no name!@rocket_test:/app/bundle$ node main.js
Illegal instruction
I have no name!@rocket_test:/app/bundle$

Edit:
I tried a few different tweaks into the config emulating the official compose-file from Docker.Official.Image/docker-compose.yml at master · RocketChat/Docker.Official.Image · GitHub . There were some differences, but changing them didn’t change the result. It just dies with “Illegal Instruction”. Is there a way to get more logging?