Last week, I came across a bug in an app that got me confused for a while. When you set a variable to a collection of records, you might find this behaviour too. At least it is good to be aware of ...
SharePains by Pieter Veenstra on MSN

ForAll patch or just patch in Power Apps

Yesterday, on Reddit I saw a question asked about Nesting a Patch inside a ForAll loop. Is a Patch function inside a ForAll loop, to update many records, the most efficient way to update your records?