Barrier?

I got myself into a pretty funny / awkward / complicated situation yesterday that I’m still thinking about it and cant stop wondering.

So I bought this bag which is handmade by a friend of mine. cool bag and I love it.

photo (10)

 

So I was wearing it yesterday to go a little bit shopping for my little brother at home. I walked into Nike and as I walked in, the barrier beeps. At first i thought its okay, that barrier might have some technical issue that I dont know of. 10 minutes later I walked out and it beeps again. The staff said its okay and all,same with me. But then as I walked into other 5 different stores in Melbourne Central, it beeps everytime I walked in or out. I have nothing in my bag though, only a pen, a notebook and bottle of water.

I got cheked by the staff a few times yesterday and it was so embarrassing yet funny that I can’t figure out why.

So here’s a video I took of what happened ( sorry for swearing )

what’s wrong with my bag?

I got home and started to google it a bit but I can’t find any answer for what just happened to me. Is it the technology behinds the barrier, or the materials that my bag was made of ? I swear I didn’t steal anything though. Or its not my bag that did that ?

Anyone have any answer to this ?

p/s : the bag is made with leather and ropes, simple as that.