I'm also looking into the same issue.

I know that hydration errors occur when the html rendered by the node server and the html rendered by the client are different.

I think that the problem may be caused by a line break in the smartphone (Samsung Browser) environment because the maximum width is small.

However, it does not occur in the smartphone (chrome).

I don't know where to ask this.

I'm using nextjs 15.2.1, react 19.0.0. Are you using a similar version?