Hello, here is an article with the details, try it with google translate, now works quite well between Hungarian and English.
In a nutshell: András Csépke, the CEO of MÁV-Start wants to save some train kilometres. The less trains, the less passengers, the less problems.
http://www.regionalbahn.hu/2017/07/nemzetkozi-menetrend-korlatozasok-2018.html