I'm having the same issue with the navbarswap. THe battery percentage icon disappear as well as the solid color inside the battery icon. Now the battery icon is just empty with no way to see how much battery there's left. Uninstalling the module resolved the issue.
I have the same issue with navbarswap mod - my percentage of battery is replaced by icon without filling.
Before installation of mod:
After installation of mod:
Moreover, icon of network and Wi-Fi are swapped as well, but this is not as important as the battery issue.
Is there any way to fix it?