Why can't the POCO F7 Ultra connect to aptX-Adaptive devices when it is connected to earphones and uses MIHC to play music?

MIHC is an audio codec that is designed to improve audio performance by providing clearer and more detailed sound reproduction.
The issue you're experiencing is related to a software problem, which occurs with a very low probability. Our team has already optimized the software in the latest update to resolve this. We recommend that you upgrade to the latest version and try again. Thank you for your support of Xiaomi products.