Watchface with crashed fonts in CIQ 4 devices

Hi, I am receiving reports from users of my watchfaces (Ultrasport) with Venu 2 or Fenix 7, reporting that the watchface is completely out of place, showing characters and progress bars in places where they should not be. I have tested in the sdk simulator and indeed this happens in all CIQ 4.x devices, in the rest CIQ 3.x or lower it does not happen, it continues to work correctly. To display these progress bars I am using custom fonts.
Has something changed in the way we load fonts?
Thank you very much for your help.