Not worry but takes time and important steps are First Eligibility which you can get Passed with as much evidence and pictures and bills as you can even if they not ask to avoid any interview and Background which takes most of the time to help get police certificate from all places you have been to even if under 6 months but longer than 3 months also fill and send all kind of forms where asked from others in advance such as Travel History Form which might shorten the process inshallah.
Hope you pass fast and get visa soon
Good Luck
Oh yes yes, I am actually sponsoring my husband. I was born and raised here, but my husband is from Pakistan. We submitted our application in August 2017.
I submitted well over the asked amount in pictures, evidence via social media and chats call logs. So I gave a lot of extras just in case.
In terms of background, they had already asked for the Police Checks and all, and the Travel History was submitted with the application. On the GC Key Account online, it still says that they are reviewing background and my husbands eligibility.