I’m new to both Tiled and this forum, so for all I know this may be a rookie mistake. Sorry if so!
So, I recently made a transition that (for all I can tell) seems to be fine in regular regards. However, upon going through the transition, I noticed the characters moved upwards. Moving the marker didn’t fix it, but I thought little of it. After a few tests, though, I found that repeatedly using the transition (2-3 times) would eventually lodge all of the characters into the upper boundaries of the area, making them stuck. I cannot for the life of me figure out what needs to be changed to fix this, so help would be really appreciated!
None of this sounds directly related to Tiled since Tiled just provides the data and your game/engine is what’s responsible for rendering these and handling transitions and the like, so you’ll probably have better luck getting help in the community for whatever engine/framework/library you’re using to build your game and do these transitions you speak of. While it’s not impossible that using Tiled maps makes a difference to making these transitions work or not work, it’s unlikely.
If you want help from the Tiled community, you’ll need to provide a lot more information, such as the engine/libraries you’re using, how you’re dealing with rendering the different layers, how transitions work in your game, etc. If it’s your own code, you should provide it. If not, a link to the relevant parts of the engine would help, if the code is publicly available. If not, then link the relevant documentation (though it sounds like you’re dealing with a bug, in which case the documented behaviour is probably of little relevance).