L13 Yoga: can't resume from suspend (s2idle) unless I plug AC cable

Hi! After being suspended for a while (30 min?) my laptop gets so energy efficient it doesn't wake up when opening the lid or pressing power button. Plugging the AC cable wakes it up enough pressing ESC at the same time wakes the laptop up. Any ideas on how can I fix this? OS: openSUSE Tumbleweed, clean install Last time this worked: before updating the BIOS for the last time. Currently testing: enabling all wakeup sources from /proc/acpi/wakeups to workaround it. Model: Thinkpad L13 YOGA BIOS: R1FET58W (1.32 ) Product Name: 20VKCTO1WW Version: ThinkPad L13 Yoga Gen 2