Your video shows you have an 'annotative' multi-leader. This is important!! It means It takes on multi personalities and each personality is related to the scale. When you are viewing the multi leader from an 'activated' viewport in paperspace, your viewing scale is 1"=1'-0" which is, as you already know, the same as your viewport scale. Converservsely, when you switch to modelspace, you are viewing your multileader in the current modelspace scale which is 3/4"=1'-0". As it now stands, you must be cognizant and understand you have two active scales in your dwg file: (a) 1"=1'-0" and (b) 3/4"=1'-0".
To complicate the situation further, you have a third scale--this third scale is associated with BOTH your multi-leader (an object) and the current viewing scale (the viewing environment your eyeballs see). By definition, all annotative multi-leaders must have at least one scale associated with it in order to be visible. Your multileader's anno-scale is BOTH 1'=1'-0" and 3/4"=1'-0", the former for layout and the latter for modelspace. To complicate this complication even further (yes, it's still possible to complicate this more), your multi-leader's anno-scale can also be 1/8"=1'-0" this is true even if you are NOT using 1/8 scale in modelspace nor in a viewport. Yes, you can give it a scale just-for-the-heck-of-it.
What does this all mean? It means your multi-leader can take on many personalities and depending on the viewing scale, you'll see what appears to be a different multileader. Remember, your modelspace and viewport have different scales, hence, the Dr. Jekyll and Mr. Hyde effect.
To resolve your issue, make your modelspace the same as your viewport scale. So if your VP scale is 1"=1'-0", and it definitely is because your video verifies it, make your modelspace 1"=1'-0" too.
From modelspace, when you click on multi-leader, quick prop shows it has scale of 1"=1'-0".....but......
your modelspace is assigned a drawing scale of 3/4"=1'-0".
You'll also need to make sure your multi-leader(s) inherit the 1"=1'-0" anno-scale so the multi-leader matches or has the appropriate personality to be consistent with VP viewing scale.
Chicagolooper
