We are using our own meshes, but we haven't seen the issue for quite a while now, so I thought I'd reach out to see if you had seen anything similar before. I'll try to force an update by moving a marker, but because there is an entire build process that takes place before I see the end result, it will take me a while to report back. Hope to have more information for you soon. I don't know for sure what exact version we're on, but the install notes mention the date 26/01/2018. Other than that all references are just to V3.