Is it safe to use disperse siblings With not reviewing sibling cards?

Hey guys, i have this note that creates 4 card types from which 2 are in one deck and other two are in other deck each, I am only reviewing the deck with 2 cards only and not reviewing other 2 siblings for some time abd they have many due cards pending to completed.

I have recently switch on Disperse sibling option, I have this worry if this situation can cause problem with scheduling the cards, I am not having any review cards for 2 days now in the deck that has 2 cards in them, although all mostly all cards are mature, though I had few young cards left in that deck but when i switch on the disperse option they become mature.

I hope i was able to convey my message, and sorry for my articulation, english is not my first language and still learning