BOSS IR-200 - Longer Impulse Responses Do Not Work Properly

When I use longer impulse responses on my IR-200, then I hear a strange artifact: Some kind of fluttering echo. The same impulse response sounds perfectly fine when I use it with plugins like GGD Studio Cabs Zilla or ReverberateCore. In this video I would like to share my findings with you. The Link to Pete Thorn&video about IR lengths is: You can find more examples in my follow-up video: