grid sometimes fails to register press / release

[ryleelyman]

reported by @dndrks on Discord. minimal repro:

-- example script.lua
g = grid.connect()
last_z = 0

function g.key(x,y,z)
  if z == last_z then
    print("oops!")
  end
  last_z = z
end

expected behavior: "oops!" never prints unless you press two different keys at once, but at the moment it prints every so often if you steadily press the same key.

• changing monome_handle_next_event to monome_event_loop doesn't appear to help
• reducing the sleep time in the loop also doesn't appear to help
• this doesn't happen in Max or on norns
• this leads me to think the issue is possibly in events.zig rather than somewhere else...

[ryleelyman]

I'm gonna reopen this. As of 0.6.3, only really mashing several keys all at once results in "oops!" in the above script or in stuck LEDs in the following

-- example script.lua
local g = grid.connect()

function g.key(x, y, z)
  if (z == 1) then
    g:led(x,y,15)
  else
    g:led(x,y,0)
  end
  print(x,y,z)
  g:refresh()
end

also when mashing the print statement occasionally includes values like 33 in x and y rather than what they should be.

I'm sort of mystified and could use expert guidance here.