Inconsistency in get_field_precision logic

meta.js

get_field_precision: function(df, doc) {
		var precision = cint(frappe.defaults.get_default("float_precision")) || 3;
		// Here if the precision exists, it should return directly, 
		// Therefore, it always can overwrite number format -> 5,6,7,8 ...
		if (df && cint(df.precision)) {
			precision = cint(df.precision);
		} else if(df && df.fieldtype === "Currency") {
			var currency = this.get_field_currency(df, doc);
			var number_format = get_number_format(currency);
			var number_format_info = get_number_format_info(number_format);
			precision = number_format_info.precision;
		}
		return precision;
	},

meta.py

def get_field_precision(df, doc):
	"""get precision based on DocField options and fieldvalue in doc"""
	from frappe.utils import get_number_format_info
  # Here it does not return directly if found a precision. 
  # Precision end up being overwritten by number format ####.## -> 2
	precision = cint(df.precision) or cint(frappe.db.get_default("float_precision")) or 3

	if df.fieldtype == "Currency":
		number_format = None
		currency = get_field_currency(df, doc)

		if not currency:
			# use default currency
			currency = frappe.db.get_default("currency")

		if currency:
			number_format = frappe.db.get_value("Currency", currency, "number_format")

		if not number_format:
			number_format = frappe.db.get_default("number_format") or "#,###.##"

		decimal_str, comma_str, precision = get_number_format_info(number_format)

	return precision