Some units cannot use waygates

Yes, both of them have this issue. The only common thing between druids of the talon and destroyers that I can think of, is that both of them are “flying” and “morphed”, unlike other “special” units who can use the waygates with no problem, like Owl Scout and Phoenix who are just “flying”, or Druid of the Claw who is just “morphed”. Interestingly this bug only affects melee maps, i.e. if I converted a melee map with portals into a custom map by adding a blank trigger and saving it, then destroyers and druids of the talon can go through the waygates just fine. Initially I thought its because the map that I originally checked it on was in the classic .w3m format, but then I added a tavern and saved the map as a .w3x while keeping it as a melee map, and destroyers and druids of the talon still couldn’t go through the waygates. This can’t possibly be intentional, as it makes all the melee maps with waygates essentially rigged in druids of the talon’s and destroyers’ opponent favour, and therefore it is definitely a bug, but I wasn’t able to figure out why does it happen with the limited access that I have.