Massive delay when switching back to table

Hello,

I have a couple of tabs on my shell, the first and main one containing 2 tables, and the tabs have various elements etc on them. In the last 2 weeks when I switch back to my main tab that has the 2 tables on it there is a massive delay around 8 seconds!

This was never there before, if I have my model empty then the delay is only 1 second, but there is no delay when switching between the other tabs, only when switching back to the one with the tables.

I recreated a static table that was similar, with hardcoded data, even with the 2 tables on that example there was an 800ms, which was noticeable and again no delay on the other tabs when switching.

Anyone have any ideas?

Thanks,

Donnchadh.