(I removed a lot from the template as it was mostly useless for the bug at hand)

System used :
PC

Frequency:
Always (when using Enemy Targeting Filter)

Character Name:
Tataneja Kokoneja

Race:
Race of your character when the issue occurred.
Lalafell M

World:
Diabolos

Class/Level:
White mage (any level)

Party or Solo:
Solo (but I doubt party would be any different)

Steps:
*The Enemy targeting filter is enable and uses default configuration (All Enemies, Aggroing Enemies)

1-Using a gamepad I first set the targetting filter to Enemy (using L1+O)
2-I then try targeting (using X or left or right on D-Pad) a monster where there are arcanist/summoner Summons
3-I can still target Summons along with enemies and the filter still shows up as being set to Enemies.