We do only have Hexa's word to go on for current events, but it's not the first time this thing has come up. In late 2022 there was Phase drama and meltdowns over Sakana instigating two very different standards of behaviour and rules for Pippa vs any other talent that resulted in Pippa feeling very excluded and fearful of her perception by the other girls.
(Warning: extremely sad Pippa crying)
Now again we don't know if this is still ongoing, to what extent, and affecting who (especially since there's been a lot of crossovers in Phase content and collab partners lately) but Sakana absolutely has done this before and it's been extreme enough to seriously unsettle some of the talents. Hexa could even be referring to this incident and just talking like it's still current when it's not.