Dashboard alerts not triggering

Recently, I ran into this same issue.  Alerts that had worked well for a long time just stop working.  An alert that only works "simetimes" is not worth much and gives you a false impression.  I think something is truely wrong with alerts as I have had the condition for days and no trigger. I need to go look into this but nothing has changed since they worked in the past.

The data is being "refreshed" but also has not "changed".  I am not sure I understand the statement 

"Alerts are only sent if your data changes."  What if there is a "Refresh" completed but there are no changes in the data. Its not an incremental update but does PBI detect a "no-change" refeesh and NOT send an alert?  The thing is, the allert is set up to detect when there are "no changed" in the updates which, in this case, indicates a problem.  But I wonder if Alert are truely only sent on a Change in the value being monitored. I guess that makes sense. But I would like to get the Alert even when the monitored value has not changed since the issue may not have been addressed.

QUESTION: If I set up a monitor to check a count measure being < 10.  On tuesday its 5 and I get an alert.  If, on wedneday its still 5 (a refresh completed but no change in the monitored value) will a new alert be sent for a "max 1/24 hours" setup.  Or will it just send a single email.  

I can see this making sense to avoid repeated alerts. The problem was we had 2 issues at the same time. I fixed one and got no alert so I though it was fixed. But a new alert was not sent because, after the new refresh, the monitored value was the same but still out of range. So, I thought a new alert would be sent but it seems it will only send the first time it passes the threshold and then not re-trigger until a new/diffrent value is seen.  This is unfortunat and as repeated alerts make sense in many situations. But I get the design if only a single alter is sent per change in value.