I have suddenly the situation that using Wool Trade and the Chewing Grass leads to an infinite loop: https://ufile.io/bk2m6m3e
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"Wool Trade" has no external command attached to it that chains it into another skill command, so it should be impossible.
"Chewing Grass" does that, so there would be an possibility for a loop.
I tested using both skills in the current build and found no problem and also tested your save in version 0.4.3 and got into no soft lock. Used both skills.
Did you do anything specific?