I have an issue with 'smithing, I can use the Forge but when I use the "tanner" or "grinder" it just backs out after sitting?

If it's a bug, it's the first time I've heard of it.

Make sure you're not pushing any of the movement keys on your keyboard while trying to engage the tanner or grinder.

If you're playing on console, that's a different matter. I am unfamiliar with console controls.

Running any Mods?