If you've set you ui_resolution to FHD in your manifest, you can calculate the actual maskSize by multiplying the image size with 2/3 (0.66666) (720/1080).
The same issue is with me, it is working on my two devices perfect but not on my clients device? Can anybody help me with the issue.
We’re upgrading Roku Community to bring you a faster, more mobile-friendly experience. You may notice limited functionality or read-only access during this time. Read more here.
Planned Downtime:
Community will be unavailable for up to 24–48 hours during the upgrade window during the week of May 19th and you may notice reduced functionality.
In the meantime, for additional assistance, visit our Support Site.
We're sorry for this disruption — we’re excited to share what’s next!