android keeps on restarting with optimizing apps

**Problem:** It constantly restarts with optimizing apps. **Some Background:** - This phone was running on low disk space some days back, which I resolved by removing unwanted files. - Some apps are third party apps installed by downloading from websites. - I have searched other threads and none seems to be solving my issue. - I have done a "cache wipe" as well, which didn't solve the issue. - This has android version 6. - I am able to run Fastboot and have access to Fill-Z touch recovery. - I obviously don't want to format (easy solution) this phone as that would delete all the data in there. **Extra resource:** vimeo link describing problem If anyone can let me know how can I disable this "Optimizing app" before the start, I'd be glad. Any help would be appreciated. Thanks in advance!