As far as I know, there is no limit to attacks, but I've also never given/been given items that increase the number of attacks a character could make. Regarding the magic items. I do not know of a rule that limits that number of magic items you can have. But there is a limit on the number of magic items you can attune to at once (3) and a creature can't attune to multiple magic items of the same kind (for example you cannot attune to two rings of protection). Also from the SRD , Use common sense to determine whether more than one of a given kind of magic item can be worn. A character can’t normally wear more than one pair of footwear, one pair of gloves or gauntlets, one pair of bracers, one suit of armor, one item of headwear, and one cloak. You can make exceptions; a character might be able to wear a circlet under a helmet, for example, or to layer two cloaks .So In my opinion, while you can have as many bags of holding as you want, you probably would be able to carry more than two at a time. I'd also be worried about carrying more than that for fear that one might accidentally fall into another and cause a portal to Astral Plane to open. Also I don't think this is a bug or technical issue.