A button glitch

[CHN_Obsidian]

Hold down the d-pad, any of ABXY, L and R in order, and release any of ABXY will cause L to release. This affects all drastic versions and could be a big problem when playing games like Megaman.

Sorry for my bad English but this issue is very gamebreaking.Any one can fix that? Thanks!

Edit: This glitch also affects R button, just change the order of L and R.

Edit 2: This glitch is very unstable and sometimes with some special key sequences it may also release the Dpad or ABXY.
Help!

Edit 3: Also affects START and SELECT. What's happening here?

Edit 4: Things are getting worse if holding these 6 buttons at the same time. It seems like there are some problems with the emulator to handle these buttons.
Could this be fixed?