Refresh generates a completely new model

[CMoranoA]

Project Robyn

Describe issue

I have a model trained with 79 weeks of data. When I refresh the model with 13 more weeks, it generates a completely new model, with new coefficients, hyperparameters, etc., even when setting bounds_freedom = NULL. Particularly, turning off some channels that were supposed to be relevant.

I find this problematic because it’s not easy to communicate contradictory results to stakeholders after just 3 months of data.

I have found similar errors in other threads (https://github.com/facebookexperimental/Robyn/issues/985), but I can’t find a solution in any of them.

Am I missing something?

Environment & Robyn version

packageVersion("Robyn") [1] ‘3.11.1.9003’

• R version (Please, check and share: sessionInfo() or R.version$version.string)

Thanks in advance!