Matte leather care??

Any advice on what to use for the Explorer matte black leather? I’ve tried using some polish and after awhile there is some weird bubbling occuring. See left boot first pic. Right boot is after using leather cleaner (saphir omni clean) which seems to bring back that matte finish. It looked the exact same as the left beforehand.

Don’t want the boots cracking so I assume I’ll need to use some kind of conditioner/polish??