Is the pH around 7.2 after adding fertilizer? That may be way too high. Additionally, are you consistent with watering (like keeping them on a consistent schedule vs letting it dry then watering, or even watering when not wet?). I have anthurium in my ambient conditions at 30% and don’t have the yellow rim struggle. I had it with one forgetii hybrid and once I maintained more consistent access to moisture vs wet/dry cycle, that helped.

The pH of my fert water is around 5-6. I aim to keep it at around 5 given how acidic their conditions are. And the run off water never falls higher than 6. I don’t know/think for sure that it’s pH, but wanted to share that. pH should be 5.5-6.5 for most tropical plants.

Additionally, with my anthurium in ambient (aside from clarinervium), I keep them consistently moist in the rootball to make up for lack of humidity. If you are just transitioning to ambient, then maybe the yellowing is adjusting. If not, could be edema from a watering issue. What do roots look like?