@1006: Just a note to say that I have edited your post to remove your Instagram username for data protection purposes.
If your issue persists after attempting the steps above, then please try uninstalling/reinstalling Instagram to see if this helps. Alternatively, head to the Google Play Store > Tap on your profile in the top right > Manage apps and device > Updates, and check for any available updates from here. I'd also suggest pressing and holding the Side button > Restart, as this will resolve any temporary software issues which might be affecting the phone's performance.
