RapidWeaver 7.1.x Preview Bug

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RapidWeaver Version: 7.1.1 (14912)
System Version: 10.12
Hardware: Happens on 2 iMacs (21.5" & 27") and a MacBook Pro 13"

If I have RapidWeaver 7 in preview mode and switch out to a different app window, when I come back to RapidWeaver, my preview reloads again. This never happened in 7.0.4 and REALLY slows down work flow. This tends to happen with all apps I switch to, but I seem to notice it more with Safari.

Expected Result:
Not reload the preview

Additional Links:
No links, this is a preview only issue.