After updating the version from 7.0.0.alpha6 to 7.0.0.alpha7, it started showing alerts that it shouldn't show. After editing the trigger and clicking on the expression constructor, it throws an error:

Cannot build expression tree: incorrect expression starting from "count(/zah_s34/sensor.psu.status[ciscoEnvMonSupplyState.1013],#1,"eq","{$PSU_CRIT_STATUS: \\""critical
"}")=1 or count(/zah_s34/sensor.psu.status[ciscoEnvMonSupplyState.1013],#1,"eq","{$PSU_CRIT_STATUS:\\""shutdown
" }")=1"."

what is interesting, however, if I try the same directly in the template and not on the host the error is not there.