[DeBraid]

Be open about the challenges of context switching and how that may lower your overall productivity.

Use specific examples (so everyone can learn) and avoid making about people by focusing on the jobs to be done.

If you're not comfortable bringing this up to boss directly, shoot through a Sr dev first (who may coach you around the issues / validate your concerns), or, Sr dev may speak up when needed to support your cause should you bring it to the group/boss.