Maybe your backlinks are from shady sources that's why they are fading.

There may be several reasons your backlinks are falling off, the first could where you are putting them up. You need good sites that will be around for a longtime, they must also be of good standing. The next is the quality of the content use, first and foremost the content must be relevant. To where it`s shared and in context to what is discuss, also of good quality and value, you have to. Craft your content so that it will benefit both you and the site where you put it, so the admin. Would want to keep it, because of the value it brings. You should also use long-lasting methods, like depositing articles at article sites, where a good well written article. Can stay up for years, this should help you, PS you always have to be creating backlinks: http://www.bimsucessfastmoney.com

number of backlinks decreases
After remove backlink from root domain can be number of backlinks decreases.
fix this?
To rank up on search engine result pages ,add root domain link (back link) with good scored Domain Authority (DA).

Usually, it is because the places where your links were no longer exist or your links were removed (as often happens with forum and comment links). That typically means they were pretty useless to begin with.

Get a complete website audit to check your backlinks. You can use Ahref for this. With this tool, you will be able to see why your backlinks are decreasing.

Loren

We are also facing the same problem.
But, maybe its occurs by low-quality backlinks.

You can fix it by getting better backlinks. What backlinking strategies are you using?

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If you make your backlinks from low DA sites then it can be happen, another thing is if your post is like spammy then site owner can delete your post this is why maybe backlinks are gone. So post in high DA sites can be fix your problem.

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First of all identify all the backlinks weather it is quality or spam my links and also the broken link then try fix it by rebuilding the links or creating the good quality links.

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You should collect all the dead backlinks and disavow them in the disavow file.

Use high PR backlinks and maintain their quality, try to create more backlinks as much as you can