Anker should know better by this point. Changing specs without notifying customers is the basic formula of every Chinese manufacturer. They must have gotten lazy with their internal QA/QC processes and random sampling.
We have an entire lab just to test upstream components (which LiPO pouch cells are part of) and most of the out-of-spec cases were suppliers changing components or assembly tooling/process. We had DC motors that were failing prematurely in products and after some forensic investigation found that the supplier changed the stator wiring to a nominally smaller diameter which was overheating and burning out - and they added more metal to the casing so they would weigh the same.
[1] Battery tester: https://www.youtube.com/watch?v=t3IE3npEcuc
*unless the product is visible external packaging.