Bluetooth connectivity after 11.2.6

Hi there, gerradfromdunedin!
Thanks for reaching out to the Apple Support Communities! It sounds like you are having an issue with losing connection a smartphone and headset to your iPhone with Bluetooth and I am happy to help! Take a look at this article with the best steps to follow If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch. While this article talks about issues connecting, these steps are also good for issues maintaining connection.
Take care!

I'm having the same issue! At first I thought it was my car audio system but after wireless headphones were affected, I'm beginning to think the problem lies with my phone/operating system - I'm on 11.2.6 as well. Apple, please fix this.. .uninterrupted music saves me during a work day!!!