[Rilgamon]

I've tested it with a simple tooltip and it works with only the line 364 changed.
Make sure you load your altered version and no other older version is available.

Edit: My test was too simple. Had no release implemented. There is more to it.
Edit2: Function in Line 179 (only clear backdrop if the frame has it implemented)

local function ReleaseFrame(frame)
    frame:Hide()
    frame:SetParent(nil)
    frame:ClearAllPoints()
    if(frame.SetBackdrop) then
        frame:SetBackdrop(nil)
    end
    ClearFrameScripts(frame)
 
    tinsert(frameHeap, frame)
    --[===[@debug@
    usedFrames = usedFrames - 1
    --@end-debug@]===]
end

Line 226

cell = setmetatable(CreateFrame("Frame", nil, UIParent, "BackdropTemplate"), self.cellMetatable)