Miagani Ultrasonic Riddler trophy issue

[Aldaris]

Mainly for reporting purposes, but there's a trophy bugged for me. Right next to Miagani Botanical Gardens there's an ultrasonic field generator trophy. Activated it but got lost of the trail after accidently failling off a bridge.

Went back to re activate but it won't do so anymore and the trail markers have disappeared completely even with pulse active. It's my last trophy on Miagani and also no longer shows up on the map.

[xh1927]

I have the same problem, only it's with the ultrasonic trophy trail that starts from the roof of Panessa Studios. If anyone knows a fix or workaround for this, I'd love to know it. I'd hate to have to go to NG+ to get ONE piddly Riddler trophy.

[Gentleman Octopus]

I had the same problem with the Panessa Studios trophy. Here's what happened to me and how I worked around it:

This is for the Panessa Studios trophy where you have to power winch over to another roof (letting the Batmobile fall off one roof and winch up the other). For me, I started the scan at the ultrasonic field generator and followed the question marks underground into the sewers. As I came out of the sewers, all the question marks disappeared for seemingly no reason. I figured it must be timed or something, so I went back to start again. The field generator was no longer green, as if I'd already finished it and got the trophy. This meant that I couldn't scan to see the question marks. I looked up the trophy online, and found out that the trophy was under the bridge just after you get out of the sewers, so I went to see if maybe I'd revealed it and not realised. Nope. So I randomly shot the Batmobile cannon at the spot where the trophy should be, and strangely, the "you just shot in the right place" sound effect played (the same one that plays when you blast open a wall with a trophy behind it). Still, I could grab the trophy with my batclaw or by any other means, because I couldn't actually see it. This is how I fixed it.

Go back to the field generator. It still won't be green. Turn on the scanner and basically pretend that you can see the question marks. If you already managed to get this working once, at least you can kinda remember where they were. If not, use a YouTube trophy walkthrough. If you move along slowly and try to scan the invisible question marks (even though they won't show), when you get to the bridge the trophy will be visible, and you can finally collect it.

At least, this is what worked for me. Hopefully it works for others.

tl;dr - If you got the field generator working once but not again, just pretend that it's working and scan the route of question marks anyway. The trophy will be at the end as if you really were scanning the question marks the whole way.

[xh1927]

Interestingly, this resolved itself... I checked the Riddler grid, and keeping in mind that I KNOW I never collected the trophy, the Bleake Island grid was complete. Apparently the game, once it shut down the ultrasonic trail and removed the green ? from the map just GAVE me the trophy, even though I didn't actually collect it. Weird.
Further perusal of the grid revealed I'd missed a trophy in the airships. Strange stuff. Anyway, 100% complete now. I still hate the ultrasonic Riddler trails. The ONE time you use it in the story mode is amusing, but it's far less finicky there than in the Riddler trails.

[Aldaris]

Same for my Miagani trophy. It suddenly just gave it to me despite never finding it.