I have this pair of bluetooth headphones: Sony WH-CH520

I have this bluetooth mechanical keyboard: Keychron K4 Pro

My PC - running on Windows 10 Pro - is regularly updated with the latest updates and drivers. I don’t have built-in bluetooth functionality, so I got a TP-Link UB500 bluetooth adapter.

Now here’s the problem: If I try using the headphones and keyboard at the same time in bluetooth mode, either the audio on the headphones would occasionally drop off/on or I would notice typos once in a while because the keyboard would similarly drop off/on as well. Using them one a time everything is fine, but I wanted to know if it’s possible to resolve the problem of having them work fine as expected when both of them are connected via bluetooth to the PC.