Does FR265 have a limit to how many things it can connect to during run?

I have a FR265. When I run I use a Stryd and Shokz ears for music. Works well.

Earlier in the year I added a HR monitor armband. It was a lesser known brand. I tried it two runs and both times the music was in and out as well as the Stryd connection. I was thinking maybe Garmin can't handle 3 things at same time?