If initialising Serum 2 then saving it as a new preset, we get Poly, S2, and Wavetable assigned as its tags. Enabling OSC B and setting it to Multisample (for example) and re-saving the preset doesn't dynamically add Multisample as an additional tag. For that, we must first delete the preset and save it again. Doing so will now save the preset with Poly, S2, Wavetable, and Multisample as tags. This is particularly a problem for the Poly and Mono tags as if a saved preset is switched from polyphonic to mono at a later time and re-saved, the Poly tag will still be present when ideally it'd be replaced with Mono.
Serum 2.0.16