I got my safeguard checked by john yesterday. Apparently everything is normal and the unit work perfectly on any setting.
For sure the problem only occurs at WOT. And problem only occurs with the safeguard working.
The only explanation John had is that the safeguard might be incompatible with the JR BTM. I really don't understand this, but I just hope he's right. Do we all have the JR BTM ??
I'm now going with Hondata S200. Will see if the problem persists or not...