This is the 4th time going back to service for the Duometre and 2nd time for the EL2. Neither watch had issues with the chrono before I sent them in. On return they both worked fine for a day or two, long enough to check them at the boutique and confirm function, and then both quickly developed issues where the chrono seconds hands wouldn't reset.
This is really not okay at any level and sadly, there's no one to raise this issue with at JLC. The ADs and boutiques do what they can but ultimately the issue lies with the Manufacture and they hide behind a webform. Good luck finding a customer service email address or phone number. The brand is basically non existent to the end customer. Great watches but this isn't how brands that hope to propser tomorrow operate today.
Counter example - a couple months ago I decided to get a pair of sunglasses adjusted. I had them a few years, way beyond the warranty period, and they never quite fit right but they are awesome, so I reached out to the brand and right away got an email from a real person in the service dept. He told me I could probably make the adjustments myself but if I wanted to send them in they'd be happy to take care of it. The day after they received them I actually got a call from the same guy who emailed me since he was also the one working on my sunglasses and wanted to clarify a few things as well as let me know he managed to break the titanium stems while making the adjustments so I would be getting all new hardware. All the work, parts, and shipping were gratis and turnaround was a week. I got better customer service on a $600 pair of sunglasses than a $60k watch. Go figure.
In summary, IMHO great watches but something is wrong at the Maison. My hope / hypothesis is the quality issues are temporary and possibly covid related. As my Duometre has been in and out of service since before covid started, I've noticed service times have kept up surprisingly well while other brands have suffered longer lead times, Patek is up to a year now for service last I heard. My guess is that JLC is trying to keep cranking out watches despite not having their full staff on hand due to covid and quality is suffering badly.
Hopefully the quality issues are temporary. The longer term issues that need to be addressed are if the decision was made to prioritize production at the expense of quality and if JLC will ever start to engage with customers directly. Both need to be righted imo for the brand to remain relevant in the years to come. I still respect the watches but the brand is just a concept at this point, the wizard behind a curtain of ADs and boutiques.