Fix policy manager restart due to a monitor failing #1207
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Fixes #1206
This reverts part of a change made in #1140. The description on that PR mentions:
However, this causes the monitorCtx to remain cancelled for subsequent iterations which as seen in the linked issue can cause the monitor to not start again after failing once.
I am however not sure if the memory leak mentioned in the original change would now be introduced again. If the
deferis what would cause it, thedefercould be removed since cancel is called later.