6.37.2 to 6.37.3 no more link on my bridge

A pair of sxt5ac bridge—station bridge running 6.37.2 exquisitely, a lot of planned reboots and link up in few seconds
Upgraded station to 6.37.3 all ok , link back
Upgraded bridge to 6.37.3 no more link, continuous channel scan and a lot of radar detected on whole spectrum , once decided to run ap, sitting on a frequency that is NOT the one declared in config , station no longer connects.

Any suggestion ?? Will I have my previous wonderful behaviour back (link in few seconds without minutes scanning for radar) ??