Rats aren't using all of their attacks at once

[Devintrainer]

1.20.1 on a custom modpack. When I give a rat more than one upgrade that gives it new ways to attack enemies (dragon, psychic, ratinator, buccaneer), it only uses the attack given by the topmost upgrade. In regards to combined upgrades, the only attacking option it uses is the one that was installed on it first. Is this intentional behavior, or is it a bug?