Early LineageOS 14.1 builds on the Tab 3 suffered from a severe memory leak caused by the mdss_fb display driver. After 48 hours of uptime, the tablet would become unusable. The April 19 build includes a backported kernel patch that resolved this leak, allowing for weeks of stability.
: This number refers to the Android version that the ROM is based on. In this case, 14.1 corresponds to Android 8.1 Oreo. LineageOS uses a version numbering that often aligns with the major and minor Android versions. lineage-14.1-20180419-UNOFFICIAL-gtel3g