Specifically when I go to my profile and click on the number of comments i've made, it shows me a blank search. Is this a problem on my end or is this something that's known?

I think you take out the user part and just put in your username in the search box

Triple: yes its a super secret method they don't want you to know of.... You type _[spacebar] before everything like this "_ user:tom641" and there you fixed it