I can verify as well. Froze all 3 in early Sept & when I went up pull my monthly 3b on Oct 1st myFICO couldn't pull experian. Contacted support & they told me I'll need to unfreeze EX (they recommended all 3 but I only have the problem with EX) before pulling reports. I spent thirty seconds and requested temporary thaw of EX for 2 days starting 11/1 and was able to pull reports just fine this time.
Apparently it's a quirk with EX that they don't consider myFICO an existing relationship after freezing.
Fico8 (Nov '17) - EQ 692(+18) TU 678 (+34) EX 691 (+24)