Do you have the objects combined in the design file or are they separate objects?
Text can be uncombined to a point that each letter gets treated separately in the motion plan.
Since it is all one color, I assume, in your design file and thus gets brought in as one operation, you can select the design and combine them. That can be done at different levels so that you can treat them all as one object or as grouped objects. Not sure what the terminology in AI is on these nor tool names.
Note the bottom info bar that says these are three objects.
Now after you combine them, they are one path. This should then engrave straight across rather than every square individually.
This might run into file size errors with your file, but I’ve done groups of tokens like this with more complications.