My monitor does the strangest thing on startup

Full disclosure, this was $10 at Goodwill so I'm not overly concerned.

Upon startip this ASUS VW266H does a bizarre pixel sorting wake-up. Once it settles and I restart the monitor it works perfectly. Getting proper refresh rate and everything.

It is running through a display -> hdmi converter but I haven't had any problems with this particular accessory before.

Any thoughts on why this may be happening?