Hey chercka,
I haven’t seen this specific issue before. Do you have the ‘Are you using an Ajax powered theme?’ setting checked on the plugin’s Settings page? If so, could you uncheck that to see whether it fixes the problem?
If it doesn’t, then I wonder if there’s a conflict with another plugin or your theme. Could you try temporarily deactivating the ‘Better WordPress Minify’ plugin you have installed to see whether that fixes the issue? If it doesn’t, then could you try switching to a default WordPress theme for a few seconds (TwentyTwelve, TwentyFifteen, etc) to see whether the issue still occurs?
Many thanks,
John