Minecarts deconnecting with furnace minecart

When you have a Furnace minecart and a normal minecart connected to eachother and you power the furnace minecart and it tries to take a turn WHILE connected to the normal minecart they stop being connected this also happense when going upp or down a block and can be annoying would be good if it gets fixed. Yes i may have some mods but they do NOT do anything to the minecarts most of them are performence mods and some are just clients mods i use for when i play on servers im using lunar client but that does not make the mact like this this was like this when i used to use the normal minecraft launcher as well. pls fix this. The version im showing is in 26.1