Media Offline when video is too long

Is there any limitation to the maximum video length supported by Resolve 15? I've successfully used it with videos that were ~40min long, but it simply refuses to recognize a file with a ~55min recording.
They are cinemaDNG video files, recorded with the BMCC. This long file will play just fine on the camera itself, but Resolve can't recognize it and I keep getting the "media offline" thumbnail, even in media tab. Is there any workaround for this?
They are cinemaDNG video files, recorded with the BMCC. This long file will play just fine on the camera itself, but Resolve can't recognize it and I keep getting the "media offline" thumbnail, even in media tab. Is there any workaround for this?