Weird indentation after alignment

[sbarzowski]

This code is formatted with jsonnet fmt:

local stringToInt(s) =
  local zeroCodepoint = std.codepoint("0"),
        stringToIntHelper(s, idx, acc) =
    if idx == std.length(s) then // see what happened here?
      acc
    else
      local digit = std.codepoint(s[idx]) - zeroCodepoint;
      stringToIntHelper(s, idx + 1, acc * 10 + digit);
  stringToIntHelper(s, 0, 0);
stringToInt("42")

A simpler artificial example:

local xxxxxxxxxxxxxxxxxxxx = 42,
      yyyyyyy =
  {
    something_long: 42,
  };
true

So if there are multiple binds in a local, and one of them has a body starting on a new line, that body gets weirdly dedented.