I couldn’t find a category for bug reports.
When the phone goes into automatic battery saver, the bliss laucher forgets icon order.
This has been the case on the official e on various versions of the Samsung Galaxy A3 2016 Exynos - “a3xelte”.
I am sorry to say that it is a bit late for that now as Samsung A3 (2016) has been demoted to “Legacy” https://doc.e.foundation/devices/a3xelte and the last dev build was e-1.17-q-20231110351091-dev-a3xelte.
Older versions of Bliss always seemed to like icons in the default locations which can be reset with Settings > Apps and notifications > See all … apps > BlissLauncher > Storage & cache > Clear storage.
… but interesting to hear that that was the trigger in your case.
To report an issue https://doc.e.foundation/support-topics/report-an-issue.