I went to do a flight out of KDFW last night. Everything went well until I clicked departure after click KDFW in the F-PLAN page. Everything started running very slow, with about 10 second MDCU input lag. Then, once I selected the runway and SID, the transitions just didn't show up. I waited for about 5 minutes, and nothing. After that I entered a different DEP airport, and there was no input lag and all of the transitions were there and worked just fine. Any help is appreciated. If you need anything else let me know.