.TUN files fail to retune MIDI note 127

Hello, very pleased with the synth. Noticed a strange bug with retuning. When using a .TUN file, but not when using an .scl nd .kbm file, MIDI note 127, i.e. the top note of the piano roll, isn’t retuned and plays the default tuning.

ETA: Should be noted that I am using REAPER 6.25 and Vital 1.08
ETA: Should also be noted that I am using Windows 10 20H2.

don´t know if it matters with this bug (probably not), but maybe post OS too.