Lol, you linked a different hospital’s rules regarding MRIs, which are that way because under normal circumstances it never shuts off. I linked you a page that shows that there are three types of MRIs, and one of them can in fact turn off its magnetic field. Now, I haven’t established if that’s the kind that they use in Al-Shifa, but it’s quite possible. At very least the fact that it’s off means there is no moving magnetic field and depending on where the magnet is, it may be totally possible to stash a bag there without negative consequences. Different machines use different magnetic strengths. The fact that the metal items in the bag aren’t being affected makes your theory not very compelling and seems to be proof that this is possible.