The company I work at sends their developers out to other companies to help them work on projects and help them in other ways (advice when communicating to customers of on demand software for example).

While not on a project you are working in house training trainees and interns. Part of that is teaching them to show initiative and treating them as full developers. The 30 interns all discussed a git flow and code format.
During the third sprint (two weeks sprints) a team messaged me if I wanted to check their merge request for the sprint.

It took me a glance at the first file to know they didnt do any review themselves. I used my flywheel to check all their changes and without being able to read the code I saw indentation was all over the place, inconsistent bracket placements etc. I let them know I wouldnt check their code until it was according to their own standards.
Two days later I got the message to check it again. At first glance the indentation was fine so I started reading the code. Every single thing was hardcoded, not made to support mobile (or any resolution other than 1920×1080).
A week later they improved it and still not good. Gave them a few pointers like I would for any colleague and off they went to fix things. The code became worse and indentation was all over the place.

I told them the next time it shouldnt be a quick glance to be able to reject it again. By this time other teams came to me asking why it wasnt merged yet and I explained it to them. One of the teams couldnt do anything u til this was merged so I told them to implement it themselves. I was surprised that 4 teams came to me asking about a merge request, that was every team except the team whose pull request it was.

4 weeks after the intitial sprint the other team made a merge request and I had three small comments and then an hour later it was merged.

The other team messaged me why their merge request did went through (still havent seen any of their team in person, Im sitting 10 meters away from them behind a wall)
They also said that it was easier for them because they started from scratch. Thats when I called them in to discuss it all and if they were not interns but full time developers they would have been fired. I told them communication is key and that if you dont understand something you come in person to ask about it. They all knew I like teaching and have the patience to explain a single thing ten times, but the initiative should be theirs.

One of the team members is my current coworker and he learned his lesson by that. The others stopped with their study and started doing something completely else.

TL;DR
Merge request is open for 4 weeks, in the end another team started from scratch and finished it within a week. The original team didnt ask me questions or come to me in person, where other teams did.

DISCLAIMER: some of you might find it harsh, but in our experience it works the best for teaching and we know when people don't dare to ask questions and we help them in that too. It's all about the soft skills at our company.