Minecraft Fluid block not acting like air

package net.mcreator.tyredianplanets.fluid.types;

import net.minecraftforge.registries.ForgeRegistries;
import net.minecraftforge.fluids.FluidType;
import net.minecraftforge.common.SoundActions;
import net.minecraftforge.client.extensions.common.IClientFluidTypeExtensions;

import net.minecraft.world.level.material.FluidState;
import net.minecraft.world.level.BlockAndTintGetter;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.core.BlockPos;
import net.minecraft.client.Minecraft;

import java.util.function.Consumer;

public class SulfurHexafluorideFluidType extends FluidType {
    public SulfurHexafluorideFluidType() {
        super(FluidType.Properties.create().fallDistanceModifier(1F).canExtinguish(true).supportsBoating(true).motionScale(1D).canDrown(true).canSwim(false).canPushEntity(false).canHydrate(false).density(6).viscosity(0).temperature(302).canConvertToSource(true)
                .sound(SoundActions.BUCKET_FILL, SoundEvents.BUCKET_FILL).sound(SoundActions.BUCKET_EMPTY, ForgeRegistries.SOUND_EVENTS.getValue(new ResourceLocation("block.wool.place")))
                .sound(SoundActions.FLUID_VAPORIZE, SoundEvents.FIRE_EXTINGUISH));
    }

    @Override
    public void initializeClient(Consumer<IClientFluidTypeExtensions> consumer) {
        consumer.accept(new IClientFluidTypeExtensions() {
            private static final ResourceLocation STILL_TEXTURE = new ResourceLocation("tyredianplanets:block/sulfurhexafluoridestill"), FLOWING_TEXTURE = new ResourceLocation("tyredianplanets:block/sulfurhexafluorideflowing");

            @Override
            public ResourceLocation getStillTexture() {
                return STILL_TEXTURE;
            }

            public boolean move(FluidState state, double gravity) {
                return true;
            }

            @Override
            public ResourceLocation getFlowingTexture() {
                return FLOWING_TEXTURE;
            }

            @Override
            public int getTintColor() {
                return -8214273;
            }

            public final boolean isAir() {
                return true;
            }

            @Override
            public int getTintColor(FluidState state, BlockAndTintGetter world, BlockPos pos) {
                return Minecraft.getInstance().level.getBiome(pos).value().getSkyColor() | 0xFF000000;
            }
        });
    }
}