Solar Orbiter observations between 16:00 UT on 23 July 2020 and 6:00 UT on 24 July 2020 showing the context of the Kelvin-Helmholtz instability observation (shaded area). (a) Magnetic fields in the RTN coordinates. (b) Ion bulk velocity V_R component. (c) Ion bulk velocity V_T and V_N components. (d) Ion number density. (e) Alfvén Mach number. (f) Normalized cross-helicity. (g) The angle between δV and B (see text). The heliospheric current sheet (HCS) is observed between 22:00 UT on 23 July 2020 and 2:00 UT on 24 July 2020, marked by purple dotted lines. The Magnetic Increase with Central Current Sheet (MICCS) is observed between 17:35 and 18:08 UT on 23 July 2020, marked by orange dotted lines.