The solution to this is to change attribute based size change to false in the config of jrmcore. It should look something like this:
# Server Sided! If ‘true’ then the size of the players will change depending on the attributs as planned, If ‘false’ then the size of the players will remain the Minecraft default (2 block height and 1 block width)
B:”Player Size Change”=true
If this is set to false then your POV will change to be the regular minecraft height (so you can actually hit people in giant form). A nice change to this would be to just change this to a client sided option, for people who like the regular height and for the people who want the POV change.