Custom Blocks parameters are not correctly recognised in optimizer

When using custom block signals with parameters it is not possible to optimize them simmetrically in optimizer. However coding the exact same block as a snippet the optimizer correctly recognises it and optimizes it simmetrically when the option is on. It would be nice if at least those custom blocks created by negating the oppositve block could be recognised as simmetric parameters accordingly in optimizer, thus we would save a lot of time by creating them with the gui instead of coding them plus their corresponding templates.