i am glad that you solved your problems but what is the solution ?!? i have same problem with my Mi 10 5G
edit: found it ! sim card is the reason of this problems.................thanks a ton
tried
xiaomi.eu_multi_MI10_V12.5.5.0.RJBCNXM_v12-11.zip
....with my MI 10 and if i start any of music player (spotify, deezer, music player) it remains on lockscreen whatever i do............it cannot be removed