In the preferences, you find an option “Auto Plate Type”:
If on, it will always use your current plate type or the last one used. I.e., assume that you continue with the plate installation, which is mostly my case.
This is helpful when you want to print the file and are not worried about the print profile. I still remember how inconvenient it was when I opened a .3mf, which included the plate type, and I forgot to change it, resulting in extra work after 5 min.
If you prefer to use print profile info regarding the plate type, unselect it.