In common with other support boards (my experience) this aggravation: get multiple results in response to topic search. Chose one, go there, and the page(s) listing results disappears. Back button on browser (ff 54 in my case) goes to page preceding the search.
Very dysfunctional, since it is often unclear from titles which post(s) may help, often need to see several.
Yes, you can/must re-enter the search, but why should you have to?