hAP ac² - Drops inet connection after reach 10Mbps+

Hi, I am beginner to mikrotik routers (prior to the hap ac2 I had the hap ac lite).

My architecture is as follows:
I have the ISP router in bridge mode connected to the mikrotik (in Home AP Dual mode).

The problem I have, which also happened to me with the hap ac lite is that after reaching speeds higher than 10 Mbp/s the internet drops (the ISP router lights stay the same) and the Mikrotik is still connected as if there was internet, but in reality there is not, and unless I restart everything unplugging and plugging again the problem is not solved.

I am currently going to try the following and then update the post, but first I was interested to know your opinions on this.

1st: Replicate the problem and get the logs from the Mikrotik.
2nd: Connect the ISP router directly to my computer and try doing a large download from there to see if it is the ISP’s problem.

Thank you very much for your attention