Figures can't be inputted to history length of medic log app

Expected behavior

I expect a value to be inputted into the history length of this app which is the desired number of records to go back in history

Actual behavior

Figures/value doesn't not input when editing history length value

How to reproduce

• download medic log from Fdroid

• run the app

• Click on the 3 dots on the right hand side top of the app

• open preferences, try to edit history length

• click on it and try to input your figure, it won't input

• Browser: Medic Log version 0.2.3
• Operating system: Android 7.0

Recording Of The Bug