I was not sure, thus checked on forum: it was version 4 of workaround, as @hagrid wrote in his comment on topic Turris OS 5.2.6 is now in the Testing branch
and I tested and answered to it
Neither version 4 of workaround for MOX boot problem was successful (at least for me) - sw reboots (via CLI) mostly hang, hard reboots via power off/on are mostly OK.