Hello,
I'm using RB750Gr3 with RouterOS v6.47.8.I see memory usage grows continuously during uptime. Features I use on the device:

• IPSec over GRE
• Static routing (5 entries)
• DHCP server
• DNS with 5 static A entries and DoH enabled
• Firewall/NAT masquerade

After a month of uptime there is less than 15% of free memory. I tried some common tricks like clearing log and disabling unused packages but it didn't help. Any advices?

Same here, hap ac lite2, if DoH enabled, memory starts to fill, and after there was no RAM left, MikroTik began to work unstable, the web interface and winbox became unavailable. If i turn off DoH - memory returns.