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Incorrect.

As a career Technology person who's primary focus has been creating and building the largest networks (SPs, CSPs, etc.) in the world, I'd like to help you understand that this suggestion of networking instabilities as the problem is incorrect.  Without even knowing what connectivity I have, to suggest it as a possible cause rather than stating it like a fact would be better serving to the community on this forum.  I know you just want to help.

My WAN connection is a 1G Fiber service, there are data centers all around me within a few miles and no construction events, etc. in progress, I'm sure you can understand.

I'll be calling Intuit, they have coding error(s) and should address them by using a tool like Cursor (AI tool), or at least do both SIT and System testing since it's obvious they are going way to fast to conduct peer-peer QA checks.  Sadly I did not get benefit of the program or their CS team.