Yes, it can assemble edit. I recently did both 60p and 24p assemble edit to the same tape via firewire.
Maybe check your deck settings. Check input setting and check Sys Format. I couldn’t do the aforementioned assemble initially because a client had set the deck input to HD-SDI and the sys format to 1080i and I was trying to do a 720p assemble via 1394.
Hope this helps.