rancher: info pointed by catalog URL makes rancher crash at ~2 minutes interval

What kind of request is this (question/bug/enhancement/feature request):

bug: unexpected container crash (i.e. a heavy slowdown)

Steps to reproduce (least amount of steps as possible):

add catalog https://swissdatasciencecenter.github.io/helm-charts/

Result:

DoS, with this log visible:

2019/03/30 00:16:03 [ERROR] CatalogController renku-helm-charts [catalog] failed with : failed to update templates. Multiple error occurred: [CatalogTemplateVersion.management.cattle.io "renku-helm-charts-renku-notebooks-0.2.1-gputest-" is invalid: metadata.name: Invalid value: "renku-helm-charts-renku-notebooks-0.2.1-gputest-": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')] | stdout
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Other details that may be helpful:

Environment information

• Rancher version (rancher/rancher/rancher/server image tag or shown bottom left in the UI): 2.2.1
• Installation option (single install/HA): single install

Cluster information

• Cluster type (Hosted/Infrastructure Provider/Custom/Imported): custom
• Machine type (cloud/VM/metal) and specifications (CPU/memory): VM
• Kubernetes version (use kubectl version): 1.11.9 & 1.13.5 - verified in both

2019/03/30 00:16:03 [ERROR] CatalogController renku-helm-charts [catalog] failed with : failed to update templates. Multiple error occurred: [CatalogTemplateVersion.management.cattle.io "renku-helm-charts-renku-notebooks-0.2.1-gputest-" is invalid: metadata.name: Invalid value: "renku-helm-charts-renku-notebooks-0.2.1-gputest-": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')] | stdout
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• Docker version (use docker version):

18.09.04, docker-ce@centos