Thanks so much for the compliments, I'm glad to hear it's being useful!
I will check this and fix it if necessary, as soon as I can. One question, are your child elements in the grid cells UIPanels (as commented in the other question above)?
Heya :)
No the UIGrid did not contain any UIPanels, however the structure was somewhat complex:
Sadly I can't share a minimal, reproducible example atm since a lot of the code is intertwined with custom functions and little time to extract it.