How to disable Texture streaming?

Hi,

I am making a game for ios, and I have a little problem. When I turn off Texture streaming in the Rendering settings, or in the settings of the texture itself, I set “Never stream” then the game doesn’t start on my device.
When Texture streaming is on, the game works fine, but when level loading, I see blurry textures that become normal after a couple of seconds.

On the 4.17 version of the engine, I turn off Texture streaming and everything works fine, but in 4.20 when I start the game on my device I see a black screen and then the game closes.

I also tried to increase r.Streaming.PoolSize but that didn’t help either.

I would like to completely disable texture streaming in the 4.20 version of the engine.
Anyone can tell me what the problem is?

In case you have 2d game with flat backgounds - you can use textures settings like UI, NoMipMaps.

It works.
I also tried it before, but it didn’t work, probably due to the fact that not all the textures in the game were square. Now I made them square, set NoMipMaps in the settings and the game started normally.
Thanks.