I am experiencing following waits

Latch Free
Space Manager: slave idle wait

When I look into AWR, I can see sleeps are more on following latches

(a) space background task latch
(b) ASM map operation hash table

Questions: are "Space Manager: slave idle wait" and "space background task latch" related to each other? What could me the reason of such latch?

I did not find any information on these two in internet, sounds like something related to space. If you have experienced this, any update will be appreciated.