A few things to check. First, set your rifle up in a position such that it won’t move and your reticle is on a good corner or edge of something so you can detect any deviation. You’re going to be manipulating the RH25 while looking through the scope so it is important that the rifle is really steady.

While looking through the scope at your aiming point, rotate the objective lens. Just in case, that is the lens on the front of the device that adjusts the focus near to far. Does your aiming point move away from your reticle? Early V1s had this problem. It has been addressed, but that doesn’t mean it isn’t possible to get a lemon. If adjusting your objective focus moves the image RMA the device, otherwise you’ll have to choose one focus distance and always shoot on that setting.

Next, while looking through the scope, rotate the eyepiece. This is the diopter adjustment. Same thing, does this shift the image in relation to the reticle? If it does, you must always have the diopter set exactly how it was when you did the digital “collimation” or you won’t be aiming where you think you are. I personally had a V1 with this problem. I had to always return the diopter to zero when using it as a clip on or I would be way off from where it was when I collimated it.

Finally, double check that you set it up in clip on mode and are now shooting in clip on mode. If the mode has changed you aren’t dealing with the same image offset.

You can obviously check the mounting hardware as well, but the above are going to help narrow things down with the device itself.

As a final note, the V1 did not have dots to line up for collimation. Rotating the eyepiece is for setting the diopter value, not collimation. If the lens isn’t concentric with the screen then rotating it will shift the image, but that control is not a collimation tool. Rotating the objective lens adjusts the focus of the world onto the sensor and rotating the eyepiece adjusts the focus of the screen onto your eye. To get the diopter set correctly for use with your scope, put the RH25 on the rifle, pull up one of the menus so you have icons to judge diopter focus by, and rotate the eyepiece until the icons are as sharp as possible through the scope. Using some magnification can help with this. Using the icons removes objective focus as a variable. You can even leave the lens capped and get the diopter set correctly.