Could it be the case that you did not disable this for the Android Keyboard (AOSP)? You find it under Setting>System>Languages and input>Virtual Keyboard

Had the same problem in Lineage OS a while ago.

I have absolutely no idea, why this function is hidden in a way that it cannot be found when searched for, in the settings menu. The ways of the Lineage OS Settings Menu are an absolute mistery to me.

Thanks for the replies.
Right now my phone doesn't want to connect with the 5 GHz network. But I thought I had seen that device using 5 GHz already. strange.

Hi,
I am using a Xperia X and experienced some problems with Wifi and bluetooth interferience in some cases.
With my old Headphones (logitech ue 9000) it is a real pain. If I try to use them while streaming something via wifi the audio is very often broken off.
If I use these headphones with another device (e.g. my ps vita) they work flawlessly. With a bluetooth speaker I purchased recently, I have less problems using my xperia x, the brake offs appear only rarely.

I read that wifi and bluetooth use the same frequencies, so I guess it can be expected that they interfere with one another.

I was just curious why this seems to be device specific.

Do other devices and OSes have techniques to avoid these interferences and ubuntu touch does not?
Has this been adressed with recent bluetooth versions and this is why I have the troubles with my old headphones?

Is it maybe possible to avoid this by just forcing my phone to use 5 GHz instead of 2.4 GHz? I think then it should not interfere with bluetooth. But I do not know how to do that.

This not really a bug I think. I am just interested in what my device does here.
I am happy for any reply.