Issue: Previous months interest earned show the current rate, not the rate which was actually applied to your savings at that time.
When I click into previous months interest earned on my Shawbrook pots, it shows the rate as being 1.81%, even though the interest earned in those months was 1.55%. It makes it difficult to look back, and is misleading.
Details to reproduce: tap “manage” on a pot, then tap “total gained”, and click into previous months interest earned.
OS: 
iOS 15.7
Device: iPhone 12 Pro
App Version: 4.53.0
Screenshots:
