Effective File Search 6.8.1 the magnifying-glass-animation does not stop when clicking "stop

ros 0.4.9-dev-50-g182a310 (0.4.8-RC-16-gaf545fe affected as well)
0.4.7rls was affected and 0.4.6rls as well (did not test further yet)

Effective File Search 6.8.1 from rapps.

Start a search, e.g. . in C:\ (to have some time to observe)
While the search-process is taking place, there is a moving magnifying-glass-animation.

When the search finishes or you press the stop button, the animation shall stop, but it does not.

2k3sp2.webm
nostop.webm

Logs ommitted as nothing gets logged in that scenario.