SteamDeck debugging isn't working as expected

I have two issues.

First, when failing an ensure, it hangs for an extremely long time. Almost an entire minute at a guess. Sometimes it resolves, other times it appears to timeout and fully crash. I can see the trace if I grab the logs, though.

Second, I can attach remote debugger to the SteamDeck but it never actually does anything, it appears to attach successfully and it does detect when the program closes. But it never breaks when an ensure fails.

This is the documentation I’ve been following: How to debug Windows games on Steam Deck (Steamworks Documentation)

I’m sending it a Debug build, using Photon. UE5.2 source build. I’d show screenshots but I don’t seem to be able to get them off the device for devkit games.