[BUG] Downloads stop too easily (after 0.6.2?)

**Describe the bug**
First of all, thank you a lot for Droid-ify, I have been using it for quite a while, and it has been a pleasant experience.

But since a few versions (I think it started from version 0.6.2 at least) any long downloads on a slow connection fails when the app is not in the foreground. It happens mostly when there are queued update downloads, even if there is a download notification going on and I have removed the app from the battery optimization list.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Updates
2. Start the update for some apps
3. Go to home screen, or another app
4. Wait for a while (or lock the screen)
5. Most of the times the download will stop if the connection is slow (from Divest repo, for instance)

**Expected behavior**
Even if the download is slow or it disconnects, the app should retry it a few times before failing, even when the app is not in the foreground.

**Screenshots**
N/A

**Smartphone (please complete the following information):**
- Device: MotoG8 (RAV/Sofiar)
- OS: Android 11
- Version: 0.6.3

**Additional context**
Again, it does not happen all the time. It seems to happen a lot with slow connections and big apps, like the Mulch Webview from DivestOS, in my case. Right now I have a slow connection, but the main problem is that it seems that it does not happen if I keep the app open in the foreground.

Thanks again. Please feel free to ask for more info.

Regards