Right Volume -0.7 db low than Left Channel (METERS) - Nuendo 13

Hello, today i need to calibrate my bettermaker limiter, for it i created:

  • One stereo channel and put the Test Generator plugin (stereo too) - Sine, 1KHZ, -18DB.

Reading the Metter on Nuendo, it shows -18db on Left Channel and -18.7 on Right Channel.

I noticed this not normal and put a third plugin meter and on it, it show all normal as -18db on Left and Right Channel.
Is this a bug on Nuendo13 ? or i mistake something?

Updating: Just now I closed Nuendo, and when I opened it again, Meter was working correctly, which leaves me to believe that some incompatibility occurred. I will monitor if this occurs frequently. Thanks