Automatic route messes internet connection

Hello everybody,
I have been using Mikrotik products for some years now and recently switched from hEX (RB750GR3) to HAP AX2.
All worked well until I recreated the EOIP tunnel (to another hEX) I used before. After applying same settings (SSTP client, firewall etc) it worked and I was happy with the result. I noticed though that my internet connection became unreliable (some sites load very slow or never). I found out that the problem was an automatic route creation to the “eoip” network.
My networks are:
192.168.55.0/24 - local
192.168.5.0/24 - external on remote hEX

The idea is that everything functions separately on local network and just one switch port is bridged to EOIP tunnel. I may lack some knowledge but something is wrong.
The dynamic routes look like below:
route dyn.png
I noticed that if I remove the 0.0.0.0/0 gateway 185.1xxxx (my public IP) route all the site start loading immediately. After some time when I noticed the problem again I logged into the router to realize that it had created that route and had to remove it again. The last step is a never ending story.
I created statically identical route with distance “2” but it didn’t help at all.

Could you tell by my description where the problem lays?

Naturally I’d like to keep the route but use it just for that particular bridge, port, device, network etc.