That’s going to be different from what initially described as a cracked speaker effect. I think my experience is more along the lines of “latency” where I hear most conversational sounds naturally through vented domes and portions of those same sounds also processed through the hearing aids at some time interval milliseconds later.
My solution was vast amounts of tinkering, first with the Jabra app. I moved the base/mid/treble sliders around a bit. Changed the noise reduction settings. Changed overall volume. After that, I went into DIY mode and spent untold hours tinkering. In the end, I am more satisfied with my own programming settings and basically leave them alone all day.
One thing you might focus on is the Noise Reduction feature. Move it off the “automatic” default mode. I found that mode caused annoying processing changes on occasion. It also could be your gains are set too high in the higher frequencies. There’s that feedback manager that can trigger unexpected sounds.
Absolutely you need to discuss your issues with your provider. Usually, they will be quite familiar with what to change in the programming settings that you won’t have access to via the app alone.