I'm only planning on fixing bugs with the core functionality of RFP2 at first, to make sure that I have a solid foundation before I do anything else on top of it, so it will be a little while before I try to tackle any of these cross compatibility issues. That said I do plan on looking at them in the future.
Please post an issue on the github, that way I can track the compatibility requests and look in to them for future releases. Make sure to include screenshots of the problem, and a detailed list of the mods, items, and steps needed to reproduce it.
Any plans on making this for 1.14.2? I really love this mod but I love my foxes more!
Neither I nor any of my friends that I am maintaining this mod for play 1.14, nor do we have any plans of upgrading, so I currently do not plan to support 1.13 or 1.14. However, RFP2 is fully open source and I would be happy to accept pull requests for these versions if someone else is willing to do the port and maintain it.