Is H4 travel advisable when H1B extension application is filed ?

[hemaa]

#Longpostalert
Hello Members

I have a peculiar and curious case of H1 and H4.My organzation's legal team is taking a long time to decide upon it.I am mentioning it in a series of events for reader's clarity.

2016 Aug : I got through lot process and was provided with a H1B petition valid until 2017 Oct
2017 Mar : got my H4 stamping
2017 June : applied for an amendment
2017 July : got stamped while my amendment was still in progress. My visa has a mention of amendment.
2017 Oct : received a RFE.The same month my H1B visa expired and I did not travel even once all the while I had a valid visa.
2017 Dec : The RFE has been responded to.
2018 Feb : I plan to travel in my H4 visa for a short duration and will be back.Meanwhile,my H1 extension application will be filed by my organization and I should have reached US already by then.
My dependent extension will also be filed by my Husband's organization during this period.

Now my questions ;

1.Are these h1 and h4 process mutually independent or both my applications will be a conflict?
2.Will my presence in US affect my H1B or H4 decision ?
3.Will my H4 application go void if I am travelling back before the decision arrives?
4.Is it advisable to travel as H4 now?I am travelling mainly for H4 extension

Please help me decide.

Thanks in advance