Can't set up profile with latest version of RSelenium for firefox

Question

this code ran for last version I used in July:

fprof <- getFirefoxProfile("c:/Users/cp/AppData/Roaming/Mozilla/Firefox/Profiles/j7a5lq0r.selenium", useBase = T)
rS <- rsDriver(browser = "firefox", port = 4567L, extraCapabilities = fprof)

but now the output is:

[1] "Connecting to remote server"
$`moz:profile

[1] "C:\\Users\\cp\\AppData\\Local\\Temp\\rust_mozprofile.7n9y6eVCqnpt"

so it creates some temporary profile not loading the set one. Anyone knows what's the issue? This profile is valid and is ok while start FF manually.