Bellows connection issue

Question about bellows connections. I am a relatively new player but experienced with bellows from scottish smallpipes. The bellows connection that came with my uilleann pipes has a tendency to slip and disconnect in a way that my smallpipe bellows don’t. While I could just use the smallpipe bellows I’m still trying to determine if its me, the equipment or some combination. I have attached a photo for reference.

My smallpipes use a hemped wood joint but the uilleann bellows use a straight rubber on metal joint and that is where the slipping happens. These bellows in general tend to move more because the belts aren’t directly screwed to the wood but I’m wondering if there are adjustments I should do to make playing with these bellows more reliable.