Logic Pro for Ipad freezing due to lack of memory

I'm new at Logic Pro and to ipad which I bought just for Logic Pro.

While editing using piano roll editor I got message not enough memory and then a freeze of everything. I deleted most of the tracks and freed up memory but the freeze symbol (snowflake). Remains. The song I was working on was created in Garageband and isn't very complex at all.

Need to know how to see how much memory is being used and why I'm using too much. Running OS 18.4.1 on Ipad Pro 6th generation.

Many thanks for any help.