Sorry, you asked how to fix that after jumping to a new zone.
So I assumed you wanted to know how to resize it to normal.
What if you just repeat /script ZO_ActionBar1:SetScale(2) after zoning?
Or first /script ZO_ActionBar1:SetScale(1) and afterwards /script ZO_ActionBar1:SetScale(2) ?
If chaning to scale 1 and then scale 2 fixes it you can add it directly to any addOn's
EVENT_PLAYER_ACTIVATED event call back via
This event will be loaded after login and after each zoning, or reloadui
Lua Code:
EVENT_MANAGER:RegisterForEvent("NameOfAddonHere", EVENT_PLAYER_ACTIVATED , function(eventId)
ZO_ActionBar1:SetScale(1)
ZO_ActionBar1:SetScale(2)
end)