Search "grouping" doesn't seem to work if you search for protondb

NS2555

Steps to reproduce:
1: Search for protondb
2: You can see that the entire screen is filled with results that are all from ProtonDB, yet they are not grouped

Expected behavior:
All of the ProtonDB links are grouped together with the main page for ProtonDB

System info:
Firefox 97 / Void GNU/Linux / International(but it doesn't seem to matter) / Europe West
Image/Video:

NS2555

possible regression maybe?

z64

NS2555 This is intentional when we have many results from the same domain in high ranking, or something like a site: query.