Minecraft Version

1.20.1

Fabric Version

Fabric 0.14.24 and Quilt 0.21.2

Fabric API Version

FAPI 0.90.7+1.20.1 and QFAPI 7.4.0 + QSL 6.1.2

Hephaestus Version

1.20.1-3.6.3.232

Describe your issue

You walk through fluids as if you're walking on land:

Vanilla water for comparison:

Crash Report

No response

Other mods

Fabric Install:

Quilt Install:

Tried reproducing with just Tinkers?

Yes

Performance Enchancers

Sodium

Searched for known issues?

Searched open issues

This has been the exact same behavior since at least 1.12.2. I think this is just a feature.

i don't think this is a feature, but i think forge 1.18 and 1.16 lacked the proper fluid behaviours so, this is likely just from it being a port of the forge version

The way most mods handle this now is to add their fluids to the minecraft:fluids/water or minecraft:fluids/lava (minecraft:fluid/water or minecraft:fluid/lava after 1.21) tags. This isn't a perfect solution, but it's enough to get Minecraft to handle the fluid physics and entity interactions.