That's a brand we don't have over here but I think Sungmoon recommended those to @AlvinDj - all he can do is put the pressure on SM for a fix in that case!
I've noticed stability is definitely better for me on FAT32 for sure - the combination of 1.02.05 and the 64GB Lexar cards formatted as FAT32 is working well for me.
What does the X2 format internally, FAT32 or ExFAT?