JavaScript heap out of memory

our backend in Pro Plan keeps on crashing due to a heap out of memory fatal error. the memory graph shows it stalls at 8GB and goes back to 4GB once I restart. I tried adding this to my launch script: "start:prod": "node --max-old-space-size=16384 dist/apps/gateway/main" but that seems to have no effect. We should have 32GB available, no? Any idea how we can fix this?