In order to keep the L5 good for Suspend to Ram and prevent malfuntions on general is important upgrade the u-boot to mainline.
Download this and unzip then install the 2 .deb: https://source.puri.sm/Librem5/uboot-imx/-/jobs/398098/artifacts/download?file_type=archive
After install the 2 deb packages execute: sudo u-boot-install-librem5 /dev/mmcblk0
reboot
Also is important update ModemManager manually to get call in work on STR.
Purism still working on battery life and improvement the suspend to ram status on L5.
With kernel 5.19+ there is improvements for battery life on inactive mode.
Also more cooler while is charching.
Now is possible to listen music with suspend to ram ON.
Purism also making alarm working on Suspend to ram ON.
Purism making a reality all promised for L5.
Many more.