After an initial Sitecore 9.1 deployment with Sitecore Managed cloud (Default installation, x-small no custom code and configuration). We notice an excessive DTU consumption on the messaging database.

I found a similar known issue with the previous version 9.0 with difference. KB point the core database.

I am wondering if someone saw this before and if those both issues are related. https://kb.sitecore.net/articles/290593