mine "was" almost same with my X99
but similar issue with my N6 too!!
note;my TV(Toshiba-2011 model and almost all Tosh TVs kinda handshake issue with external devices!)
so in this respect this problem comes with Tosh TV and with X99/N6 etc.,
note;I'v tried X99 and N6 with my neighbor's TVs and no any issue(CEC-HDMI)

one of Sony and one of Samsung those TVs 2016 and 2018 models
But its not bother me
Bye++
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