About Underwater Swim Fix (MC-220390)
From ModrinthFixes the bug where if you hit an entity while swimming and holding the sprint hotkey, the server will think that you are not swimming anymore, while the client does. resulting in weird behavior.
Fixes MC-220390 a bug where if you hit an entity while swimming and holding the sprint hotkey, the hitboxes server and clientside will be different. Resulting in weird behaviour where the client thinks that theyre swimming while the server doesnt think that. So when you for example try to go into a 1x1 block space while experiencing this bug, you will glitch out until you stop swimming and swim again.
The bug really annoyed me in monuments so I fixed it.
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Highlights
From source dataGame versions
Supports 284 Minecraft versions, the newest being 26.1-snapshot-1.
Loaders
Runs on Fabric.
Footprint
Rated a light load on a server.
Underwater Swim Fix (MC-220390) on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Fabric
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.0.3, released 2026-01-06
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Fabric | 1.13 to 3D-Shareware-v1.34 (284 versions) | 3D-Shareware-v1.34 |
From 4 recorded builds of Underwater Swim Fix (MC-220390).
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.0.3 | 2026-01-06 | 1.21.11 to 26.1-snapshot-1 (10 versions) | Fabric |
| 1.0.2 | 2026-01-06 | 1.18 to 1.21.10 (26 versions) | Fabric |
| 1.0.1 | 2025-10-04 | 1.13 to 1.21.10 (45 versions) | Fabric |
| 1.0.0 | 2025-04-25 | 1.14.2 to 3D-Shareware-v1.34 (261 versions) | Fabric |
Run Underwater Swim Fix (MC-220390) on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogQuality of life & UI
Small conveniences, tweaks and interface improvements players notice straight away.
Runs on your server
From source side supportModrinth lists Underwater Swim Fix (MC-220390) as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- Fabric
- Runs on
- Serverrequired on the server
- Game versions
- 26.1-snapshot-1 and 283 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓Authorbikerboys, as published on Modrinth
- ✓LicenseMITFree
