GOOD NEWS!
As soon as I replaced the TA with the one from my other Java Fuoco bike, the rear wheel wobble/play disappeared!
Looks like LongTeng sourced the wrong size TA.
It is only 3mm shorter than the supplied thru axle with 2mm spacer. This Java TA should fit and fix the play issue. Please try and report! I'm getting ready to make an order on this frame once this issue is sorted out.
