I'm having a strange issue regarding the WiFi tethering feature.

I'm running the latest stable version of OSMC on an Raspberry Pi 3B+ and it's connected to the network via cable and it gets it's IP address via DHCP.
I've configured WiFi tethering via the GUI, but I didn't get an IP address assigned when I tried connecting to the WiFi hotspot.
That was easily fixed by setting dnsproxy=yes inside of /etc/connman.pers, but then I've noticed that some devices are able to connect to the WiFi perfectly fine and some can't connect at all.

I tired my and my mother's phone, which are both OnePlus devices running LineageOS and they connect just fine to the WiFi.
But the Samsung phones of my sister and her boyfriend (both the same model running the Samsung stock ROM) wouldn't connect no matter what you would try.

Then I tried connecting my mother's laptop which is running Ubuntu and it connects perfectly fine.
After that I tried my Macbook Pro from 2014 which is running macOS Catalina and Windows 10, when I'm on macOS the WiFi connection works, but as soon as I switch to Windows 10 it wont connect anymore.

All devices that refuse to connect are just telling that they could not connect to the WiFi and nothing else, but if I try to connect those devices to any other WiFi e.g. a regular router, they work as intended.

I haven't found anything on the internet that would be helpful for this really strange problem so that's why I'm opening up this issue.