That looks like an end breath. If there aren't any end breaths in the voicebank you want to use, just change the lyric to R.
Somewhat related discussion, but I don't like when people include voicebank-specific things in USTs that they distribute for public use. Such as end breaths, or note suffixes, or special flags, or any other extra samples. They make it more finicky and confusing for the end user. Ideally, a publicly distributed UST only has the essential notes and lyrics and maybe whatever pitchbends/vibrato is absolutely necessary. And most definitely for the USTs to be straightforwardly made- like complete melody and harmony tracks.
When you personalize a UST to a specific cover, to a specific voicebank and specific expressive choices, it becomes harder to adapt it otherwise. That kind of detail work should be down to the individual. Believe me, my personal files can be a total MESS.