Has anybody noticed this …
RouterOS 6.38.7 in WinBox does not show anything for encryption algorithm if using aes-gcm:
Everything is actually working and command line shows encryption correctly:
ip ipsec installed-sa print
Flags: A - AH, E - ESP
0 E spi=0x0000000 src-address=1.2.3.4 dst-address=5.6.7.8 state=mature enc-algorithm=aes-gcm enc-key-size=160 enc-key="xxxxxxxxxxxxxxxxx"
addtime=aug/31/2017 14:00:30 expires-in=16m53s add-lifetime=24m/30m
current-bytes=52 replay=128
Seems like a small bug 
And it is actually fixed in 6.39.2 … so this could be of interest only to someone still using “Bugfix” only version
Regards …