Change to DHL shipping policy?

Hello. I’ve used Zenmarket for many years to mainly buy used clothing, and I always ship through DHL since they’re the most reliable, fastest, and allow for service locker pickup settings pretty easily. I recently got told by Zenmarket that I shouldn’t be shipping via DHL anymore because they would hold my package and ask for material information, and more specifics about the clothing. Has something changed with DHL? Is this common? I’ve never had that happen so I’m confused if this is a recent policy change in DHL.