Poster not loading after updating to Version: 2.23.5

Since updating to Version: 2.23.5 the Video Poster does not show anymore. It just flashes the poster image and disappears and only the player control is left.

[video webm="XXXX" width="100%" height="100%" video poster="https://images.fastcompany.net/image/upload/w_1280,f_auto,q_auto,fl_lossy/wp-cms/uploads/2017/06/p-1-what-happens-to-your-brain-when-you-work-on-vacation.jpg"]

I tried other image links and video links. Everything worked fine before, only this time after updating that this started happening. Hoping someone could provide me an insight on what may have gone wrong. Thank you