I’ve observed an unintended behavior with DrawMaterialToRenderTarget blueprint node.
When you are using several of these in a blueprint, with different materials and targets, it causes progressively deteriorating hitches:
1 minute into the game:
3 minutes into the game:
5 minutes into the game:
10 minutes into the game:
And so on, up to tenth of a second and above.
Can’t say for sure, if the issue was there in earlier versions.