It appears to be a similar problem that has been reported previously. The same scrollbar script is most likely used by another plugin or the theme and it automatically tries to load itself again on the search results box, causing the visual problem.
I'm close to releasing the next bugfix update addressing this issue, until then the only temporary solution is to turn off the scrollbar script on the Compatibility Options submenu: https://i.imgur.com/lwPukjn.png
The next update should be ready within 3 days, then you can turn this option back on. Sorry about the inconveniance.Best,
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