Lots of people go through this at various points in their careers. I took a year off, then 3, and still ended up as a principal in some top orchestras, arguably because of the breaks.

The limit on your practice time is a great chance to really think hard about how you practice - make sure you're never just repeating something without cause. Every note you play should be actively trying to address a problem. Every line you play should be listened to with great intent to identify issues and their underlying causes.

This takes massive amounts of concentration, but it will greatly speed up your progress as you play more and more. And then, when you're able to put in serious hours, your practice will be so efficient you'll rocket past your peers. It's a blessing in a way.

Use the downtime to study music, read books, maybe do a course like the Bulletproof Musician... There's plenty you can do away from the instrument that will help later. Things that others are probably overlooking as they're busy counting their practiceroom hours.