Sporadic Gateway Error (Mashup error) Dataflow

They said they have already implemented a large machine 100% dedicated to us (which is true), and there’s no need to modify it. The atmosphere may not be ideal, as it could seem like we are trying to shift the issue onto their side instead of resolving it.

In the previous weeks I've already asked to increase the disk size, also to grant us working days to optimize the infrastructure. Which I have done, but it is still not enough to avoid having dataflows fail occasionally. Anyway, this is more on the relational side of things. I wish I could understand what this bug is on the technical side.
AS you suggested a new machine could help probably, but I usually build this type of set up and I've never had any issue, never encountered this type of error, even with bigger flows.