I just checked your attached test XRNS on Windows 10 Pro (build 19042.906 version 202H, using ASIO4ALL latest Beta drivers) and am not hearing anything unusual. This might be an OSX issue. @taktik
You might take a screenshot of your Audio tab in Renoise Settings, also probably note your OS build info from wherever you find that on Macs in another post. The more information you provide, the more likely someone may be able to help.
I don’t have any OSX devices, so I don’t think I will be of any further use.