I’m using the 2.0 beta dev11 firmware.
Place the cloned Mutable Resonator in a patch, then scroll down to the options menu to change the resonator type (e.g. set it to FM Voice). Press back a few times to get to your patch and then press Play to start the patch. The Resonator module has forgotten the FM Voice setting and falls back to “Sympathetic strings” mode.
This also occurs if the patch is not running. As you as you exit the Options menu it forgets the new setting.