I reorganized (simplified) my code so clean as possible, excluding eventual side effects, excluding eventual “circular re-trig”, … (I even not need usage of “lock” mechanism) …
I avoid so far as possible usage of trigger on values. Most is done in a “cyclic cron”,… I begin to be absolutely sure of my code (it’s not often) 
…
Luckily, after posting my problem on a topic related to bindings, somebody experiments also the same problem.
The problem should be probably in the zwave binding and/or in the SRT itself.
Still Thanks for your help.
Charly.