The headphones bug still exists with ido. The pause button isn't working at all and if the vol+ button is pressed the volume immediately goes up to max (Xiaomi Piston Hybrid)
xiaomi.eu_multi_HM3_V7.5.1.0.LAICNDE_v7-5.1 works fine.
xiaomi.eu_multi_HM3_V8.0.1.0.LAICNDG_v8-5.1 has the same error.