[SleepLog] screen refresh issues on banglejs 2

### Affected hardware version

Bangle 2

### Your firmware version

2v18

### The bug

Everything updated, the sleep log app mangles the output when switching between days (left / right swipe), see image


expected behaviour: display texts properly, not have junk displayed on the left of the screen, or the "calculating data, please wait" text visible at all times

### Installed apps

simple clock
simple pedometer
charging status
thermometer
launcher
message icons
weather
heart rate monitor
alarms widget
daylight saving
scheduler
health tracking
alarms & timers
astrocalc
tea timer
bluetooth widget
compass
notifications (default)
bootloader
batery level widget (vertical)
messages
sleep log
settings
my location
message ui
android integration