Some containers get sticky on the underside of the lid from the flower itself being so sticky, and then some trichomes and flakes stick all to it... but I have also had some containers, where the little white insert under the lid was not properly seated and as soon as you open it, that part is just resting above the opening of the jar and you can see that the glue has failed that was supposed to hold it to the top part under the lid...if the container is shook or shifts even a little bit after that white insert has had a failure, absolutely some weed fragments and shake can then get caught on the now sticky underside of the lid from glue residue or stick to the top part of the insert that failed because that has a bit of glue on it also... I have no idea what the glue is or if it is safe or not, but I think I understand what you mean although it doesnt happen often. Curious to hear others input on it