Table not loading with long running query

I have a long running API call that takes about 8 minutes to load.
I do some processing in a hashtable.
After that I put the data in a new-udtable.

Right now the table is not loading anymore.
After the API call finishes the Table does not display.

There are about 1400 rows that are returned, however when I limit that to about 800 the data is displayed again. ($mailAccounts | Sort-Object | Select-Object -First 800)

Looking at the CPU and memory it is all well within tolerances.

I do not check this every time I pull a new docker image, but it was working (a few versions) before.
I tried new-uddatagrid as well instead of new-udtable, but it is not working either.

what could be the cause of this?

Edited:
For 800 rows my JSON payload is about 700kB.
So I tried switching to a server-side table instead of the client-side table, and loading all the rows.
That is not working either, the table does not load.

Product: PowerShell Universal
Version: 5.5.4
Azure webapp, linux container

I have solved it for now with Parallel processing, which sped up the query time considerably.