Maths button problem - software or hardware?

Hi, Im loving my er-101/102 combo but one thing that bugs me is the math button. Sometimes when i press it just once its applying math transformation twice, like it’s super sensitive. Same thing with the insert button but it rarely happens, with the maths it’s happening frequently… so is this a hardware problem or could it be solved with a software update? Im not so keen sending it away to be repaired since i don’t want to be without it.
Anyone experiencing similar stuff with theirs or is just mine?