Not being able to send images in telegram sounds serious - but I am not aware of anybody else experiencing this problem.
You could report this issue as explained in this post: How to report /e/ issues
Some of the notifications are currently there for debugging reasons and the devs said, that they will be disabled at the end of the beta phase. These include uploads of system-files like “settings_secure.xml”, “settings_system.xml” or “packages_list.csv”.
If you want to disable those, then you can switch off their synchronization as a workaround in
settings -> Accounts -> /e/ -> “Application settings”.