FrameLevel at 127 in layout-cache.txt

some users are having an issue with my mod (ArkInventory) where the main windows background is covering the items and other objects contained within it rendering them unclickable.

we thought at first it was another (HUD) mod conflicting by pushing up framelevels of other objects in the UI to make sure the HUD stayed in place but some users don't, and never have, had a HUD mod installed.

if you open the layout-cache.txt for your character you will see the following;
Frame: ARKINV_MainFrame1
FrameLevel: 127
X: 842
Y: -439

in game the users can manually script the frameLevel down to 3 and it'll readjust and become useable but it eventually goes back to 127

reloading the UI, or swapping characters can also fix the problem temporarily.

so all i can think of thats left is a possible bug in wow that constantly pushes the framelevel up but i don't know how to get conclusive proof. ie, i can't duplicate the cause myself, i can easily duplicate the results by editing the layout file but i don't think that'd help too much.