I've exported my game (Super Space Slayer 2) to Android and in recent builds I've found a new issue with transparency (specifically using the 'semi-transparent' effect with a blend coefficient, normally 128).
The bug is easy enough to reproduce. If you minimize the game while a semi-transparency effect is visible, then enter the game again, a screenshot of how the game looked when you minimized is is visible, but only inside other semi-transparency effects. Screenshots below should explain what I mean.
Please login to see this attachment.
Minimize the game here...
Please login to see this attachment.
...and that screen appears as an after-image inside other transparency effects.
Closing the game completely and re-starting stops the after-image from appearing.
Clickteam Fusion version: 2.5, build R291.6 (July 9 2018)
Minimum Android version: 4.1
Target Android version: 8.0
Android version of my phone it's being tested on: 8.0.0
Samsung Experience version: 9.0
This issue has not been seen in PC builds of the game, just Android.