emowl Bazaar downloads it's own version of composer by having it as a dependency, and the composer downloaded by pockethold is deleted after it is finished.
The only thing I can think of that could cause this due to pockethold, is if the following command could cause any corruption of bazaar in any way.
require flagrow/bazaar --update-no-dev --ignore-platform-reqs --prefer-dist -n -o
@luceos - Could it?