Glow Squid entity data (potion effects, custom name, ...) does not get saved
when I entered the command
/summon minecraft:glow_squid ~ ~ ~ {ActiveEffects:[{Id:14,Amplifier:0,Duration:999999}]}
it doesn't work, I tried the nbt on other mobs and it worked
Additional notes
Glow squids seem to be unable to load potion effects from ActiveEffects. They don't work in /summon, and effects are lost when relogging.