issue with SecureFrameTemplate and MODIFIER_STATE_CHANGED (world of warcraft. wow api issue)

problem.lua

-- local f = CreateFrame("Frame", "TestFrame1", UIParent) -- works
local f =  CreateFrame("Frame", "TestFrame1", UIParent, "SecureFrameTemplate") -- doesn't work  with key/up/down
f:SetSize(100,100)
f:SetPoint("CENTER")
f:SetFrameStrata("FULLSCREEN")
f.bg = f:CreateTexture(nil, "BACKGROUND")
f.bg:SetAllPoints()
f.bg:SetColorTexture(.7, .2, .2)
f:SetAlpha(0.5)
f:SetScript("OnEnter", function()
      -- f:SetPropagateKeyboardInput(false)
      f:EnableKeyboard(true)
      f:RegisterEvent("MODIFIER_STATE_CHANGED")
      DEFAULT_CHAT_FRAME:AddMessage("in")
end)
f:SetScript("OnLeave", function()
      -- f:SetPropagateKeyboardInput(true)
      f:UnregisterEvent("MODIFIER_STATE_CHANGED")
      f:EnableKeyboard(false)
      DEFAULT_CHAT_FRAME:AddMessage("out")
end)
f:SetScript("OnEvent", function(w, _ev, key, state)
      DEFAULT_CHAT_FRAME:AddMessage("got ev  : " .. (key or "nil") .. " : " .. tostring(state))
end)
f:SetPropagateKeyboardInput(true)
--f:SetScript("OnKeyDown", function(w, k)
--      DEFAULT_CHAT_FRAME:AddMessage("key down: " .. k or "nil")
--end)
--f:SetScript("OnKeyUp", function(w, k)
--      DEFAULT_CHAT_FRAME:AddMessage("key up  : " .. k or "nil")
--end)
DEFAULT_CHAT_FRAME:AddMessage("f created")

runs (prints ev...) when there is no OnKeyUp or OnKeyDown but doesn't anymore with (works without SecureFrameTemplate and keyup/down)

halp

with non secure:

local f = CreateFrame("Frame", "TestFrame1", UIParent) -- works
-- local f =  CreateFrame("Frame", "TestFrame1", UIParent, "SecureFrameTemplate") -- doesn't work  with key/up/down
f:SetSize(100,100)
f:SetPoint("CENTER")
f:SetFrameStrata("FULLSCREEN")
f.bg = f:CreateTexture(nil, "BACKGROUND")
f.bg:SetAllPoints()
f.bg:SetColorTexture(.7, .2, .2)
f:SetAlpha(0.5)
f:SetScript("OnEnter", function()
      -- f:SetPropagateKeyboardInput(false)
      f:EnableKeyboard(true)
      f:RegisterEvent("MODIFIER_STATE_CHANGED")
      DEFAULT_CHAT_FRAME:AddMessage("in")
end)
f:SetScript("OnLeave", function()
      -- f:SetPropagateKeyboardInput(true)
      f:UnregisterEvent("MODIFIER_STATE_CHANGED")
      f:EnableKeyboard(false)
      DEFAULT_CHAT_FRAME:AddMessage("out")
end)
f:SetScript("OnEvent", function(w, _ev, key, state)
      DEFAULT_CHAT_FRAME:AddMessage("got ev  : " .. (key or "nil") .. " : " .. tostring(state))
end)
f:SetPropagateKeyboardInput(true)
f:SetScript("OnKeyDown", function(w, k)
      DEFAULT_CHAT_FRAME:AddMessage("key down: " .. k or "nil")
end)
--f:SetScript("OnKeyUp", function(w, k)
--      DEFAULT_CHAT_FRAME:AddMessage("key up  : " .. k or "nil")
--end)
DEFAULT_CHAT_FRAME:AddMessage("f created")

ps: same behavior on wow classic and shadowland pre patch