Docker Playground Error after BuildX

When i run OpenSpeedTest Docker image in Docker Playground i am getting

net::ERR_CONTENT_LENGTH_MISMATCH 200 (OK)

Results failed GET request.

Commands i used

docker run --restart=unless-stopped --name=openspeedtest -d -p 80:8080 openspeedtest/latest

Recently i used buildX

docker buildx build -t openspeedtest/latest:speedtest --platform linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/386,linux/arm/v7 . --push

When i run locally it is working fine.
upload://m2VdwBHXmGh7sjfBdW3DD12j8BA.jpeg
Why it is behaving differently on some machines ?
I am doing something wrong here?