This is all awesome information, and I’m sure that DG or Manta will get back to you on this as soon as they can. They just both work insane hours IRL, so it might be a bit of a wait.
But if you have found a work around, try to use that until they can figure out the problem. It is possible that it is a browser related thing, but I am so tech-challenged that I beg you not to take me on my word on that