Have you tried adjusting the latency for the H90’s insert? Instructions can be found here: https://cdn.eventideaudio.com/manuals/h90/1.9.7/content/edit-modes/routing.html#insert-routing

Do you also have this issue when using the Mood in mono? Have you tried adjusting the stereo width of the Mood? Details on p14 of the manual: https://static1.squarespace.com/static/622176a9b8d15d57ffbf5700/t/64111ea7c3f6d569218566b4/1678843563430/MOOD+MKII_Manual_Pedal_Chase+Bliss.pdf