JW Alive Bug in Strike Events

In general , when a new day’s strike events start,some come during the first 12 hours,and after 12 hours are replaced with the second half,this has not been happening for me since the past 2 days,and I have missed a few events. Please fix this if it is a bug .
Not to forget mentioning,rare strikes and epic strikes are coming at a much lesser frequency in range,is this a change(a horrible one indeed if it is) or a bug?