Unitsymbol parse and format again with UCUMFormt fails

[ChMThiel]

After parsing a symbol and formating to Unit again, the same symbol should be created or at least a equivalent Unit.
But for Units that contain number 10 (or multiplications of it) that fails:

Example 1: L/(100.km)

@Test
void shouldBeSameSymbol() {
    //given
    UCUMFormat ucumFormat = UCUMFormat.getInstance(DEFAULT_UCUM_FORMAT);
    String unitSymbol = "L/(100.km)";
    Unit programatic = LITER.divide(KILO(METER).multiply(100));
    //when
    Unit parsed = ucumFormat.parse(unitSymbol);
    String parsedSymbol = ucumFormat.format(parsed);
    //when
    assertTrue(parsed.isEquivalentTo(programatic)); //ok
    assertThat(parsedSymbol, is(unitSymbol)); //fails
}

results in Expected: is "L/(100.km)" but: was "L/(10^2.km)"

That is acceptable...should at least be equivalent. But when i try to parse that again:

@Test
void shouldParseLiterPer100kmWithExp() {
    //given
    UCUMFormat ucumFormat = UCUMFormat.getInstance(DEFAULT_UCUM_FORMAT);
    String aUnitSymbol = "L/(10^2.km)";
    //when
    Unit<? extends Quantity<?>> parsed = ucumFormat.parse(aUnitSymbol);
    String parsedSymbol = ucumFormat.format(parsed);
    //when
    assertThat(parsedSymbol, is(aUnitSymbol));
}

an Exception occures during parse:

systems.uom.ucum.internal.format.TokenException
	at systems.uom.ucum.internal.format.UCUMFormatParser.SimpleUnit(UCUMFormatParser.java:207)
	at systems.uom.ucum.internal.format.UCUMFormatParser.Annotatable(UCUMFormatParser.java:158)
	at systems.uom.ucum.internal.format.UCUMFormatParser.Component(UCUMFormatParser.java:122)
	at systems.uom.ucum.internal.format.UCUMFormatParser.Term(UCUMFormatParser.java:77)
	at systems.uom.ucum.internal.format.UCUMFormatParser.Component(UCUMFormatParser.java:141)
	at systems.uom.ucum.internal.format.UCUMFormatParser.Term(UCUMFormatParser.java:96)
	at systems.uom.ucum.internal.format.UCUMFormatParser.parseUnit(UCUMFormatParser.java:67)
	at systems.uom.ucum.format.UCUMFormat$Parsing.parse(UCUMFormat.java:491)
	at systems.uom.ucum.format.UCUMFormat$Parsing.parse(UCUMFormat.java:509)

Even worse when i try with symbol "L/(10.mm)"

@Test
void shouldBeSameSymbol2() {
    //given
    UCUMFormat ucumFormat = UCUMFormat.getInstance(DEFAULT_UCUM_FORMAT);
    String unitSymbol = "L/(10.mm)";
    Unit programatic = LITER.divide(MILLI(METER).multiply(10));
    //when
    Unit parsed = ucumFormat.parse(unitSymbol);
    String parsedSymbol = ucumFormat.format(parsed);
    //when
    assertTrue(parsed.isEquivalentTo(programatic), parsedSymbol); //fails here!
    assertThat(parsedSymbol, is(unitSymbol));
}

the parse results in a symbol "L/(da.mm)"...which imho makes no sense.
Trying to parse 'L/(da.mm)' leads to a TokenException, too (same StackTrace as in example 1):

@Test
void shouldParseLiterPer10mmWithDeka() {
    //given
    UCUMFormat ucumFormat = UCUMFormat.getInstance(DEFAULT_UCUM_FORMAT);
    String aUnitSymbol = "L/(da.mm)";
    //when
    assertDoesNotThrow(() ->  ucumFormat.parse(aUnitSymbol)); //fails, throws tokenException
}