I think the tab is some form of mechanism to keep the door handle from opening itself from side impact. On my cars I found nothing it interacted with just that if moved it could stay that way when cold outside so I took them off.
This is the nub that causes the problem.
When I was concerned that removing the whole thing could cause a problem eg DLA have a sensor that looks for it, I used to cut that off. When I determined nothing in the latching/locking mechanism has any way to use it I just started removing the whole thing.
On closer examination it appears that mechanism blocks the handle from lifting if there is rapid sideways acceleration eg side impact. I think the designers were concerned the mass of the door handle could unlatch the door from a side impact or roll over.
The inside and outside door handles are not active when the door is locked so it’s a moot point for anybody that drives with their door locked.
The e70 has a completely different design and I've never seen a how to DIY on replacing yet so I suspect the MTBF is much longer!