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I believe I am experiencing this same issue, though specifically what I'm seeing is that when I set the appropriate debug cookies / headers in a browser at attempt to debug I'm seeing 502 errors in the browser and SIGSEGV in the fpm_xdebug container:
Preconditions
Steps to reproduce
Use this docker-compose that are generated by ece-docker
docker-compose up -d
php -i
Expected result
Actual result