Consider these two versions of the same code:
let db =
[
{| Name = "Liam"; Id = 2 |}
{| Name = "Noel"; Id = 3 |}
]
let f = List.filter (fun x -> x.Id = 7) db
let db =
[
{| Name = "Liam"; Id = 2 |}
{| Name = "Noel"; Id = 3 |}
]
let f = List.filter (fun (x) -> x.Id = 7) db

Applied code fixes lead to different spacing:

Accidentally this is more an inconsistency than a bug - but definitely caused by the bug, same cause and treatment as this one