Hello, dear community!
We’ve made a new v3.4.6 release with some bug fixes and enhancements. Many thanks to the community members for your contributions! 
Here are some of the updates:
- Fix some many many perf issues in graphQL @alexandrebodin
- Fix sanitize removing polymorphic relations @alexandrebodin
- Bug: Erroneous error if there is a database configuration for a custom session middleware storage provider. - @taylor-work
- strapi-plugin-upload: Read responsive breakpoints from config - @blefevre
- Get preview mime type from thumbnail (to support video thumbnail) @darron1217
- add support for actionOptions for provider upload and delete functions @Bobby_Glidwell
As usual, more details in the changelog 
Cheers,
The Strapi team