u/Ecstatic_Syllabub_58

I went away for a business trip and came back to this high on my tile bathroom wall. It looks like an egg sac to me, but I don’t see any other signs of an infestation yet, and I didn’t think roaches did this type of thing. I understood them to be little shady infiltrators and terrorists, but this reads like an uncharacteristically aggressive warning shot lol. Do German roaches have adhesive sacs? Can they lay them on a recently bleached tile wall? Could this be something else?
Thank you in advance for your help.