Mar 11 2020
We are experiencing extremely slow page loading in document libraries when the default view is grouped by one or more columns (in our case, managed metadata columns).
For example, a library view which groups first by MMD column 1, then MMD column 2, with approximately 300 documents, takes around 30 seconds to load.
Is this expected behavior in the modern experience? I do not recall views such as these being an issue in the classic SharePoint experience.
Thanks for any feedback/advice.
May 04 2020
I am not sure you still have this issue, or not, but please try different browsers or change the column filters and see if there is any difference or not?