OPEN DES
Care to disagree. Already mentioned and reference provided, the low level inhibition does not affect an RA that is already in progress. Opposite to your conclusion.
You seem to have used Table 3 on pg. 32 but missed the text on page 30: "If a Descend RA is being displayed as own aircraft descends through 1100 feet AGL, the RA will be modified to a Do Not Climb RA." (*)
Ref. Introduction to TCAS II Version 7.1, FAA 28 February 2011.
(*) = for which the aural alert is "level-off, level-off" on v 7.1 (#)
(#) = unlike on the 7.0 that calls out "adjust V/S, adjust"