Comment 1 for bug 1846966

Thanks for reporting this bug.

Do you mind opening a PR with a fix at https://github.com/mixxxdj/mixxx/pulls?
Fixing this is as easy as openeing https://github.com/mixxxdj/mixxx/blob/master/res/controllers/Reloop%20Terminal%20Mix%202-4.midi.xml:
* find all [SamplerN] controls with <midino>
0x1C - 0x1F (Play from Cue) and
0x62 - 0x65 (Shift: Stop)
* change Sampler1 > Sampler5, Sampler2 > Sampler6 and so on
* do this for <control> (buttons) and <output> (LEDs) elements

The manual with the MIDI notes is currently there (page 14)
https://www.reloop.com/media/catalog/product/pdf/2/2/4/224849_Reloop_IM.pdf